Question

2) ( * - 2m)2= * - 40m +4m2 -​

Answer 1

Ответ:

$\boxed{\ (a-b)^2=a^2-2ab+b^2\ }\\\\\\(\ \boxed{*}-2m)^2=\boxed{*}-40m+4m^2=\boxed{*}-2\cdot (2m)\cdot 10+(2m)^2=\\\\{}\qquad \qquad \qquad \qquad \qquad \qquad \qquad =10^2-2\cdot 10\cdot (2m)+(2m)^2=\\\\{}\qquad \qquad \qquad \qquad \qquad \qquad \qquad =100-40m+4m^2\\\\\\(\ \boxed{10}-2m)^2=\boxed{100}-40m+4m^2$

Answer 2

To simplify the given expression, let's expand and collect like terms:

( * - 2m)2 = * - 40m + 4m2

Expanding the square of "* - 2m" yields:

(* - 2m)(* - 2m) = * * + * (-2m) + (-2m) * + (-2m)(-2m)

= * * - 2m * - 2m * + 4m^2

Combining like terms, we have:

• • • 2m * - 2m * + 4m^2 = * - 40m + 4m^2

So the simplified form of the expression is:

• • • 2m * - 2m * + 4m^2 = * - 40m + 4m^2