Question

(1 - 7x)(1 + 9x) answers??

Answer 1

Lets get started :)


( 1 - 7x )( 1 + 9x )
Let us distribute

1 ( 1 ) + 1 ( 9x ) - 7x ( 1 ) - ( 7x )( 9x )
1 + 9x - 7x - 63x²

1 + 2x - 63x²

Answer 2

(1 - 7x)(1 + 9x) = -63x² + 2x + 1

Explanation:

We have to solve:

(1 - 7x)(1 + 9x)

(1 - 7x)(1 + 9x) = 1(1+9x) -7x(1+9x)

= 1+9x-7x-7x×9x (on distributing 1 and -7x)

= 1+9x-7x-63x²

= -63x² + 2x + 1 (on combining the like terms)

Hence, (1 - 7x)(1 + 9x) = -63x² + 2x + 1