Question

(7x+1)(2x-x)=8 )))))))))))))))))))))))))))))

Answer 1

(7x+1)(2x-x)=8

(7x+1)*x=8

7x²+x-8=0

D= 1+224= 225

x1= (-1+15)/14= 1

x2= (-1-15)/14= -16/14= -8/7

Answer 2

Let's simplify the expression step by step:

(7x + 1)(2x - x)

First, distribute the terms in the first parentheses to the terms in the second parentheses:

= 7x * 2x + 7x * (-x) + 1 * 2x + 1 * (-x)

Now, perform the multiplications:

= 14x^2 - 7x^2 + 2x - x

Combine like terms:

= 7x^2 + x

So, the simplified expression is 7x^2 + x.