How do you square this? (√3+√5)² = (√3 + √5)(√3 + √5) {when squaring a binomial, multiply it by itself} = √3 (√3) + √3 (√5) + √5 (√3) + √5 (√5) {used foil method} = √9 + √15 + √15 + √25 {multiplied through} = 3 + 2√15 + 5 {evaluated square roots} = 8 + 2√15 {combined like terms} © Algebra House
2 Comments
10/10/2012 06:09:22 am
Why are rules for squaring a binomial different from squaring a radical?
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10/10/2012 06:48:56 am
When squaring a radical, you simply remove the square root sign:
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