Question

(-7х-у)(7х-у)=пжпжпжжп​

Answer 1

(-7x-y)(7x-y)=-49x2-7xy-7xy-y2=-49x2-y2

Answer 2

To expand the expression (-7x - y)(7x - y), you can use the distributive property (also known as FOIL). FOIL stands for First, Outer, Inner, Last, and it's a method for multiplying two binomials. Here's how you can do it:

(-7x - y)(7x - y)

First: Multiply the first terms in each binomial: (-7x)(7x) = -49x^2

Outer: Multiply the outer terms in each binomial: (-7x)(-y) = 7xy

Inner: Multiply the inner terms in each binomial: (-y)(7x) = -7xy

Last: Multiply the last terms in each binomial: (-y)(-y) = y^2

Now, combine all the results:

-49x^2 + 7xy - 7xy + y^2

Notice that the middle terms (7xy and -7xy) cancel each other out. So, the simplified expression is:

-49x^2 + y^2

So, (-7x - y)(7x - y) simplifies to -49x^2 + y^2.