January 2019 1 115 Report
11.) a(b+c)+4(b+c)
12.) a(m-n)-b(m-n)
13.) 2a(a-b)-b(a-b)
14.) 3x(2x+5)-7(2x+5)
15.) 5x(x-3y)+2y(x-3y)
16.) 3ab+9b²+12bc
17.) a²b+a²b²-abc
18.) p²-p²q+pq²r
19.) 24p²-12p²q-16p³r
20.) 15x²y³-10xy⁴+20x³y²z
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