4x square 2-7x=15 can help me with problem?

4x^2-7x=15


x = -5/4

x = 3

good luck

4 x ² - 7 x - 15 = 0

( 4 x + 5 ) ( x - 3 ) = 0

x = - 5 / 4 , x = 3

4x^2 - 7x = 15
4x^2 - 7x - 15 = 0
4x^2 + 5x - 12x - 15 = 0
(4x^2 + 5x) - (12x + 15) = 0
x(4x + 5) - 3(4x + 5) = 0
(4x + 5)(x - 3) = 0

4x + 5 = 0
4x = -5
x = -5/4 (-1.24)

x - 3 = 0
x = 3

∴ x = -5/4 (-1.24), 3

4x^2-7x=15
4x^2-7x-15 = 0 this ia quadratic equation
You can solve using quadratic formula or factor method
4x^2-7x-15 = 0 A = 4 ,B = ( -7) ,C = (-15)

X = (-) B + or(-) SQR(B^2-4AC)/2A
X = (-) (-7) + or(-) SQR((-7)^2-4x4x(-15))/2x4
X = (7 + or(-) SQR(49+225)/8
X = (7 + SQR(49+225)/8 or X = 7 (-) SQR(49+225)/8
X = ( 7 + SQR(274)/8 or X = 7 (-) SQR(274)/8
X = ( 7 + 16.5529)/8 or X = 7 (-) SQR(16.5529)/8
X= 2.9441 or x = (-1.1941)

Change it to a quadratic equation then use the quadratic formula to solve for x.

4x^2 - 7x = 15
4x^2 - 7x - 15 = 0
(4x + 5)(x - 3)
x = -5/4, 3