Question

SIMPLIFY? -9√28a^2 * 1/3√63a

Answer 1

@ganeshie8 could you help?

Answer 2

\[-9\sqrt{28a^2}\times \frac{1}{3}\sqrt{63a}\]?

Answer 3

@satellite73 yes :)

Answer 4

k
\[28=4\times 7\] so
\[\sqrt{28a^2}=\sqrt{4a^2}\sqrt7=2a\sqrt7\] for the first term

Answer 5

\[63=9\times 7\] so
\[\sqrt{63a}=\sqrt9\sqrt{7a}=3\sqrt{7a}\] for the second term
then we can multiply

Answer 6

\[-9\times 2a\sqrt7\times \frac{1}{3}\times 3\sqrt{7a}\]
\[=-18a\sqrt{49a}=-18\times 7\times \sqrt{a}=-126\sqrt{a}\]

Answer 7

@satellite73 okay that helped so much! thank you :)

Answer 8

yw