ALGEBRA FOR COLLEGE STUDENTS-SMITH Week 6 - Multiplying Square Root Ex... MASTERY 17% CURRENT OBJECTIVE Use polynomial multiplication to multiply square roots Question Simplify: $(2 + \sqrt{7})(2 - 4\sqrt{7})$.
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(2 + √7)^2 = (2 + √7)(2 + √7) = 2(2) + 2(√7) + √7(2) + √7(√7) = 4 + 2√7 + 2√7 + 7 = 11 + 4√7 Show more…
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