Multiply the following and verify the result by taking a = - 1 , b =2,
c = 1
a) {½a - 3b}²
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Answer:
−a
2
b×a
3
b
2
=−a
2+3
b
1+2
=−a
5
b
3
Verify:
If a=2 and b=3
−a
2
b=−(2)
2
×3=−4×3=−12
a
3
b
2
=(2)
3
×(3)
2
=8×9=72
−a
2
b×a
3
b
2
=−12×72=−864
−a
5
b
3
=−(2)
5
×(3)
3
=−32×27
=−864
Hence, verified.
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