find the product of 3x³ y² and (2x - 3y). Also verify the result for x=2 and y=-1
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Answer:
3x
3
y
2
×(2x−3y)
=3x
3
y
2
⋅2x−3x
3
y
2
⋅3y
=6x
4
y
2
−9x
3
y
3
Now, for x=−1,y=2, we have
L.H.S.-
3x
3
y
2
×(2x−3y)
=3(−1)
3
(2)
2
(2⋅(−1)−3⋅(2))
=3⋅(−1)⋅4×(−2−6)
=(−12)×(−8)
=96
R.H.S.-
6x
4
y
2
−9x
3
y
3
=6(−1)
4
(2)
2
−9(−1)
3
(2)
3
=6⋅1⋅4−9⋅(−1)⋅8
=24+72
=96
∵ L.H.S. = R.H.S.
Hence verified.
Step-by-step explanation:
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