Question

Need help rn 30 points

Answer 1

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)