simplify: (c) [(5x+3)(8x+6)]+[(-9x+10)(12x^2+5x-5)]
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Answer:
–108x³+115x²+149x–32
Step-by-step explanation:
See how it comes:
—break round brackets by multiplying both the terms:
= {40x²+30x+24x+18}+[(–108x³+(–45x²)+45x+102x²+50x–50]
=40x²–45x²+102x²+30x+24x+45x+50x+18–50–108x³
= –108x³+115x²+149x–32
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