Question

I NEED HELP!!!

Answer 1

simplify (sqrt y + sqrt 2)(sqrt y - 7 sqrt 2)

Answer 2

Use FOIL to multiply. Keep in mind that like terms under √ signs multiplied together become the value beneath the radical, so √y(√y) = y.

(y + √(2y) + 7(2) + 7√(2y))
(y + 14 + 8√(2y))

Answer 3

???

Answer 4

(A+B)(c+d)
A(c+d)+B(c+d)
distribute property twice
Ac+Ad+Bc+Bd
so yours would be like;
\[(\sqrt{y}+\sqrt{2})(\sqrt{y}-7 \sqrt{2}) \\ \sqrt{y}(\sqrt{y}-7 \sqrt{2})+\sqrt{2}(\sqrt{y}-7 \sqrt{2})\]
distribute
and use the whole \[\sqrt{y} \sqrt{y}=y \text{ mentioned above }\]

Answer 5

thx you guys! DO you tink you could help me with one more?