Question

Find the solution of
2x²+7x=-9
X²+4x+4=0

Answer 1

Explanation:

2x²+7x=-9

2x²+7x+9=0

Using the quadratic formula:

x = [-7 +/- √(7^2 - 4*2*9)] / 4

= (-7 +/- √-23)/ 4

= (-7 +/- i√23)/ 4

= -7/4 - 4.7958i/4, -7/4 + 4.7958i/4.

= -1.55 - 1/12i, -1.55 + 1/12i (correct to the nearest hundredth)

X²+4x+4=0

(x + 2)^2 = 0

x = -2 (* 2)