Question

finx the product. 4x-9(16x²-72x+81x)​

Answer 1

Answer:

Follow this rule.

put larger equation common, and multiply by smaller equation. See -

Step-by-step explanation:

Q. 4x-9(16x^2-72x+81x)

Ans.

= 4x-9(16x^2+9x)

=4x(16x^2+9x)-9(16x^2+9x)

=64x^3 + 36x^2 - 144x^2 - 81x

=64x^3 - 8x^2 - 81x