. If 5x2 + 7x = 6, which statement is correct? A) x = 2 or x = 3/5 B) x = –2 or x = 3/5 C) x = 2 or x = – 3/5 D) x = –2 or x = -

Question

Vadim26 [7]

2 years ago

11

. If 5x2 + 7x = 6, which statement is correct? A) x = 2 or x = 3/5 B) x = –2 or x = 3/5 C) x = 2 or x = – 3/5 D) x = –2 or x = -

3/5

Mathematics

1 answer:

Alex_Xolod [135] · Answer 1 · 2022-03-07T16:19:12+03:00

Alex_Xolod [135]2 years ago

4 0

I'm assuming you are asking 5x^2+7x = 6, and not 5*2 +7x = 6
We would use the quadratic formula to solve this.
5x^2+7x-6

(-7+-sqrt(7^2-4*5*-6))/2*5
(-7+-sqrt(49+120)/10
(-7+-sqrt(169)/10
(-7+-13)/10
-20/10=-2
6/10=3/5
So the answer is B) <span>x = –2 or x = 3/5</span>