Question

2 представте в виде многочлена вырожения
1)(p+8) 2
2)(10x-3y)
3)(x-9)(x+9)
4)(4m+7n)(7n-4m)
срочно

Answer 1

$(p+8)^2=p^2+2cdot 8cdot p+8^2=p^2+16p+64\\(10x-3y)^2=(10x)^2-2cdot 10xcdot 3y+(3y)^2=100x^2-60xy+9y^2\\(x-9)(x+9)=x^2-9^2=x^2-81\\(4m+7n)(7n-4m)=(7n)^2-(4m)^2=49m^2-16n^2$