A. -2, -1/2
B. 4, -1
C. 4, 1
D. -2, 5/2
Explanation:
2×2 + 4x + x + 2 = 0
2x(x + 2) + 1(x + 2) = 0
(x + 2)(2x + 1) = 0 => x = -2, -1/2
Correct Answer: -2, -1/2 ✔
Last Updated: February 08, 2020
Related MCQs
- Find the roots of quadratic equation: 3x2 – 7x – 6 = 0?
- Find the roots of quadratic equation: x2 + x – 42 = 0?
-
I. a2 – 13a + 42 = 0,
II. b2 – 15b + 56 = 0 to solve both the equations to find the values of a and b? -
I. a3 – 988 = 343,
II. b2 – 72 = 49 to solve both the equations to find the values of a and b? -
I. 9a2 + 18a + 5 = 0,
II. 2b2 + 13b + 20 = 0 to solve both the equations to find the values of a and b? -
I. x2 + 11x + 30 = 0,
II. y2 + 15y + 56 = 0 to solve both the equations to find the values of x and y? -
I. x2 + 3x – 18 = 0,
II. y2 + y – 30 = 0 to solve both the equations to find the values of x and y? -
I. x2 + 9x + 20 = 0,
II. y2 + 5y + 6 = 0 to solve both the equations to find the values of x and y? -
I. x2 – x – 42 = 0,
II. y2 – 17y + 72 = 0 to solve both the equations to find the values of x and y? -
I. x2 + 5x + 6 = 0,
II. y2 + 9y +14 = 0 to solve both the equations to find the values of x and y? -
I. a2 + 8a + 16 = 0,
II. b2 – 4b + 3 = 0 to solve both the equations to find the values of a and b? -
(i). a2 + 11a + 30 = 0,
(ii). b2 + 6b + 5 = 0 to solve both the equations to find the values of a and b? -
(i). a2 – 9a + 20 = 0,
(ii). 2b2 – 5b – 12 = 0 to solve both the equations to find the values of a and b? -
(i). a2 – 7a + 12 = 0,
(ii). b2 – 3b + 2 = 0 to solve both the equations to find the values of a and b? - A man could buy a certain number of notebooks for Rs.300. If each notebook cost is Rs.5 more, he could have bought 10 notebooks less for the same amount. Find the price of each notebook?
- Find the quadratic equations whose roots are the reciprocals of the roots of 2x2 + 5x + 3 = 0?
- Find the value of a/b + b/a, if a and b are the roots of the quadratic equation x2 + 8x + 4 = 0?
- If a and b are the roots of the equation x2 – 9x + 20 = 0, find the value of a2 + b2 + ab?
- The sum of the square of the three consecutive even natural numbers is 1460. Find the numbers?
- One root of the quadratic equation x2 – 12x + a = 0, is thrice the other. Find the value of a?
- The sum of the squares of two consecutive positive integers exceeds their product by 91. Find the integers?
- If the roots of the equation 2x2 – 5x + b = 0 are in the ratio of 2:3, then find the value of b?
- The sum and the product of the roots of the quadratic equation x(power 2) + 20x + 3 = 0 are?
- If the roots of a quadratic equation are 20 and -7, then find the equation?
- The roots of the equation 3x2 – 12x + 10 = 0 are?
- Find the roots of the quadratic equation: 2×2 + 3x – 9 = 0?
- Find the roots of the quadratic equation: x2 + 2x – 15 = 0?