Question

Solve the equation (3x–1)(5x+4)–15^2=17

Answer 1

`x=3`

Step-by-step explanation:

we have

`(3x-1)(5x+4)-15x^2=17`

applying the distributive property left side

`(3x-1)(5x+4)-15x^2=17\\15x^(2)+12x-5x-4-15x^(2)=17`

Combine like terms

`(15x^(2)-15x^(2))+(12x-5x)=17+4`

`(0)+(7x)=21`

`7x=21`

`x=21/7=3`