Evaluate -4abc(6a²+2b²) when a =1, b=-1 ,c=5
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-4abc(6a²+2b²)
when a =1, b=-1 ,c=5
-4abc(6a²+2b²)
=-4*1*-1*5(6*1²+2(-1)²)
=20(6+2)
=20*8
=160
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refer to the attachment hope it helps you g ❤️
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