Question

olve 4x2 = 12x + 40.

Answer 1

Try this one yourself, come on!

Answer 2

solve 4^2

Answer 3

first step should be moving everything over to one side and dividing everything by 4

Answer 4

Thats the Point, I dont know how.

Answer 5

Ok, i'll show u this ex. Try the next one:
4x^2 = 12x + 40
4x^2 - 12x - 40 = 0

Answer 6

now divide everything by 4:
x^2 - 3x - 10 = 0

Answer 7

Now use the discriminant formula:
D = (-3)^2 - 4*(1)*(-10) = 9 + 40 = 49

Answer 8

x1 = (-b - sqrt(D))/(2a)
x2 = (-b +sqrt(D))/(2a)

Answer 9

x1 = (3 - 7)/2 = -2
x2 = (3+7)/2 = 5