Need help rn 30 points

Question

asked May 25, 2022 131k views

1 Answer

Sylwek · Answer 1 · 2022-05-31T13:13:57+0000

Answer: X = (
$-(5)/(4)\\$ , 6)

Explanation:

x(4x - 19) = 30

4x^2 - 19x = 30

4x^2 - 19x - 30 = 0

ax^2 + bx + c = 0

X{1}=
$\frac{-b+\sqrt{b^(2) -4ac}}{2a}\\$ =
$\frac{19+\sqrt{(-19)^(2) -4(4)(-30)}}{2(4)}\\$ = 6

X{2}=
$\frac{-b-\sqrt{b^(2) -4ac}}{2a}\\$ =
$\frac{19-\sqrt{(-19)^(2) -4(4)(-30)}}{2(4)}\\$ =
-(5)/(4) = -1.25

X = (
$-(5)/(4)\\$ , 6)