Someone help ASAP solve -5x^2+7x=-9

Question

asked Feb 18, 2020 184k views

1 Answer

Arul Kumaran · Answer 1 · 2020-02-25T05:52:58+0000

Answer:

x=(7 +/-√(229) )/(10)

Explanation:

To solve the quadratic, use inverse operations to set it equal to 0.

$-5x^2+7x=-9\\-5x^2+7x+9=0$

To solve, use the quadratic formula and substitute a= -5, b= 7 and c= 9.

$x=(-b +/-√(b^2-4ac) )/(2a) \\\\x=(-7 +/-√(7^2-4(-5)(9)) )/(2(-5)) \\\\x=(-7 +/-√(49+180) )/(-10) \\\\x=(7 +/-√(229) )/(10)$