Question

Can someone show me how 2 simplify (2 √5 +3 √7)² step by step

Answer 1

so you know that (a+b)^2 = a^2 + 2ab + b^2 ?

Answer 2

Yeah but i dont know what 2 do with that....

Answer 3

ahha, you have to use it?

So what is \[(2\sqrt{5})^2\]

Answer 4

20

Answer 5

Yes. and what is \[(3\sqrt{7)}) ^2\]

Answer 6

63

Answer 7

Yes. and what would approx be 2 x \[2\sqrt{5} . 3\sqrt{7}\]

Answer 8

i mean 2 . 2 root 5 . 3 root 7

Answer 9

huh?

Answer 10

i mean \[(2\sqrt{5)}^2 = 20, (3\sqrt{7)}^2 = 63, what is 2 . 2\sqrt{5} . 3\sqrt{7} ?\]

Answer 11

166