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Expand the following. Question = (5x + 3)3Answer = 125x3 + 225x2 + 135x + 27 |
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Answer» STEP1:Equation at the end of step 1 (((125 • (x3)) - (32•52x2)) + 135x) - 27 STEP 2 :Equation at the end of step2: ((53x3 - (32•52x2)) + 135x) - 27STEP3:Checking for a perfect cube 3.1 125x3-225x2+135x-27 is not a perfect cubeTrying to FACTOR by pulling out : 3.2 FACTORING: 125x3-225x2+135x-27 Thoughtfully split the expression at hand into groups, each GROUP having two terms :Group 1: 135x-27 Group 2: -225x2+125x3 Pull out from each group separately :Group 1: (5x-1) • (27)Group 2: (5x-9) • (25x2) |
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