6. Simplify and then verify the result for the given values.
(i) (3x – 4y) (4x2y + 3xy); x = 2, y = -1
Answers
Answered by
17
Answer:
3x-4y×4x2y+3xy
3(2)-4(-1)×4(2)2(-1)+3(2)(-1)
6+4×8×(-2)+(-6)
10×(-22)
-220
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Answered by
14
Answer: 12x^3y-7x^2y^2-12xy^3
Step-by-step explanation:
=3x×4x^2y+3x×3xy^2-4y×4x^2y-4y×3xy^2
=12x^3y+9x^2y^2-16x^2y^2-12xy^3
=12x3y-7x^2y^2-12xy^3
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