Question

my problem is to simplify or expand: (d+h) sq +(d-h) sq

Answer 1

\[(d+h)^{2}+(d-h)^{2}\]

Answer 2

I keep getting 2d^{2} or just d squared....what am I doing wong

Answer 3

ok, first show me what you get when you expand \((d+h)^2\)

Answer 4

\[d ^{2}+h ^{2}\]

Answer 5

that is not correct.\[(d+h)^2=d^2+2dh+h^2\]

Answer 6

how do you get that?

Answer 7

you probably made the same mistake in \((d-h)^2\)

Answer 8

oh ok I know now I forgot I have to add the whole problem too

Answer 9

I did

Answer 10

\[(d+h)^2=(d+h)(d+h)=d(d+h)+h(d+h)=d^2+dh+dh+h^2\]\[\qquad=d^2+2dh+h^2\]

Answer 11

Thank you I keep forgetting to add thw whole problem in the sq

Answer 12

yw