show that: (1.5x²y)²-(1.5x²-1.2y)²=7.2x²y
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Answered by
2
Answer:
Step-by-step explanation:
(1.5x−4y)(1.5x+4y+3)−4.5x+12y
=(1.5x)(1.5x)+(1.5x)(4y)+(1.5x)(3)−(4y)(1.5x)−(4y)(4y)−4y×3−4.5x+12y
=2.25x
2
+6xy+4.5x−6xy−16y
2
−12y−4.5x+12y
=2.25x
2
−16y
2
Answered by
0
(1.5x²+1.2y)²-(1.5x²-1.2y)²=7.2x²y
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