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

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