The solution of the quadratic equation using the discriminant formula is option C. -3 ± √18 / 4 or 0.31 and a negative of 1.81.
What is a quadratic equation?
A quadratic equation is the second-order degree algebraic expression in a variable. the standard form of this expression is ax² + bx + c = 0 where a. b are coefficients and x is the variable and c is a constant.
The quadratic expression is given as
(4x + 3)² = 18
On solving, we have
(4x + 3)² = 18
(4x + 3) = √18
4x = - 3 ± √18
x = -3 ± √18 / 4
Therefore, x = 0.31, -1.81
The solution of the quadratic equation using the discriminant formula is option C. -3 ± √18 / 4 or 0.31 and a negative of 1.81.
More about the quadratic equation link is given below.
brainly.com/question/2263981
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