it's from 9th standard exam
give perfect answer
plzz do it fast
only if u know the answer
answer it
or els don't answer
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Step-by-step explanation:
1.
A ) A straight line segment can be drawn joining any two points.
B ) Any straight line segment can be extended indefinitely in a straight line.
We know that (x-y)3 can be written as
(x-y)(x-y)(x-y)
We know that (x-y)(x-y) can be multiplied and written as
x2-xy -yx +y2 (x-y)
= x2-2xy +y2 (x-y)
= x3-2x2y +xy2-yx2+2xy2-y3
= x3-3x2y +3xy2-y3
Answer
(x-y)3=x3-3x2y +3xy2-y3
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