Question

5а *2в2-5а*3ав-а2в+6ав2

3х*4у2-0.8у*4у2-2ху*3у+у*3у2-1

2m2n2-mn3-m4-m2n3+mn3+2m4

Answer 1

5а·2в²-5а·3ав-а²в+6ав² = 16ав²-16а²в

3х·4у²-0.8у·4у²-2ху·3у+у·3у²-1 = 6ху²-0,2у³-1

2m²n²-mn³-m⁴-m²n³+mn³+2m⁴ =   2m²n²-m²n³+m⁴