Question

Which of the following are solutions to the equation below?

Check all that apply
4x²+ 12x+ 9 =25​

Answer 1

that 4x is 25 makes 20

Answer 2

B and C

Explanation:

First, we need to get the left side equal to zero. Take away 25 from each side to get
`4x^2+12x-16 = 0`.

We can use the quadratic equation of
`(-b+ -√(b^2-4ac) )/(2a)` to find the solutions.

Plug them in to get
`(-12+-√(144 -(-256)) )/(8)`.

Simplify.

`(-12+-√(400) )/(8)`

`(-12+-20)/(8)`

`(8)/(8)` or
`(-32)/(8)`

1 and -4

x = 1 and -4