## marcybaby Group Title simplify by factoring. $\sqrt{90}$ i get 3√10 one year ago one year ago

1. cwrw238

sqrt90 = sqrt9 * sqrt 10 you are correct

2. UnkleRhaukus

√10=√2√5

3. MtMtx

we think of number that go into 90 that give is a 'nice ' square root that we can work out easily with no decimals if possible by 'nice' square roots we mean $\sqrt{4},\sqrt{9},\sqrt{16},\sqrt{25}.....$ these numbers are called 'square numbers because you can form a square out of 4 dots, 9 dots, 16 dots etc...so $\sqrt{90}=\sqrt{9}\sqrt{10}=3\sqrt{10}$