Question

Simpify the expression 7-x (-5x)-10 4x

Answer 1

Step 1. Gather like terms


`7-(-5x*x)-10,4x`

Step 2. Use Product Rule:
`x^(a) x^(b) = x^(a+b)`


`7-(5 x^(2) )-10,4x`

Step 3. Simplify brackets


`7+5 x^(2) -10,4x`

Step 4. Simplify
`7+5 x^(2) -10` to
`5x^(2) -3`


`5 x^(2) -3,4x`

7+5{x}^{2}-10