How do you simplify #sqrt3*3sqrt21#?
2 Answers
May 17, 2018
Explanation:
As you multiply roots, then the equation can become
but we can take out the 3, making it
May 17, 2018
Explanation:
#"using the "color(blue)"law of radicals"#
#•color(white)(x)sqrtaxxsqrtbhArrsqrt(ab)#
#rArrsqrt3xx3xxsqrt21=3xxsqrt(3xx21)=3sqrt63#
#3sqrt63=3(sqrt(9xx7))=3(sqrt9xxsqrt7)=3(3sqrt7)=9sqrt7#