Expand (3x + 4y – 5p)^2
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Answered by
9
Answer:
Step-by-step explanation:
(3x + 4y – 5p)2 =(3x)2 +(4y)2 +(- 5p)2 + [ 2 ×(3x) ×(4y)] + [ 2 ×(4y)×(- 5p)] + [ 2 ×(3x)×(- 5p)]
{ ∵(a + b +c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ac }
= 9x2 + 16y2 + 25p2 + [ 24xy ] + [ – 40yp ] + [– 30xp ]
= 9x2 + 16y2 + 25p2 + 24xy – 40yp – 30xp
Answered by
2
Answer:
= 9x2 + 16y2 + 25p2 + 24xy – 40yp – 30xp
Step-by-step explanation:
3x + 4y – 5p)2 =(3x)2 +(4y)2 +(- 5p)2 + [ 2 ×(3x) ×(4y)] + [ 2 ×(4y)×(- 5p)] + [ 2 ×(3x)×(- 5p)]
{ ∵(a + b +c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ac }
= 9x2 + 16y2 + 25p2 + [ 24xy ] + [ – 40yp ] + [– 30xp ]
= 9x2 + 16y2 + 25p2 + 24xy – 40yp – 30xp
i hope it hepls ^_^
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