Question

Tìm x

4x(x−5)−(x−1)(4x−3)=5

Answer 1

\(4x\left(x-5\right)-\left(x-1\right)\left(4x-3\right)=5\)

\(\Rightarrow4x^2-20x-4x^2+7x-3=5\)

\(\Rightarrow-13x=8\)

\(\Rightarrow x=-\frac{8}{13}\)

Answer 2

nhân bung ra ta có

\(4x^2-20x-4x^2+7x-3\)=5

<=> \(-13x-3=5\)

=> x = \(\frac{-8}{13}\)

Answer 3

\(4x\left(x-5\right)-\left(x-1\right)\left(4x-3\right)=5\)

\(\Rightarrow4x^2-20x-4x^2+7x-3=5\)

\(\Rightarrow-13x-3=5\)

\(\Rightarrow-13x=8\)

\(\Rightarrow x=-\frac{8}{13}\)