Question

Write –2x2(–5x2 + 4x3) in standard form

Answer 1

We open the brackets

And use the laws of indices

-2x^2(-5X^2+4X^3)

Opening brackets

10X^4-8X^5 we get X^4 and X^5 because the terms we have multiplied have common bases and therefore we have added the powers

Hence our answer is 10X^4-8X^5