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Need help rn 30 points

Need help rn 30 points-example-1
User Kronion
by
8.0k points

1 Answer

7 votes

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)

User Sylwek
by
8.0k points

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