Question

(2y-7x)^2-14x(3x-2y)

Answer 1

Ответ:

4у^2+7х^2 жду лайков)))

Answer 2

(2у-7х)²-14х(3х-2у)

4у²-28ху+49х²-42х²+28ху

4у²+7х²

Answer 3

To simplify the expression (2y-7x)^2 - 14x(3x-2y), let's break it down step by step:

Step 1: Expand the squared term (2y-7x)^2: (2y-7x)^2 = (2y-7x)(2y-7x) = 4y^2 - 14xy - 14xy + 49x^2 = 4y^2 - 28xy + 49x^2

Step 2: Expand the second term: 14x(3x-2y): 14x(3x-2y) = 42x^2 - 28xy

Now, let's substitute these expanded expressions back into the original expression:

(2y-7x)^2 - 14x(3x-2y) = (4y^2 - 28xy + 49x^2) - (42x^2 - 28xy) = 4y^2 - 28xy + 49x^2 - 42x^2 + 28xy = 4y^2 + 7x^2

So, the simplified form of the expression (2y-7x)^2 - 14x(3x-2y) is 4y^2 + 7x^2.