class 8 maths chapter algebraic expressions question is find the product of the following question hai a (b) (2 x + 3 y ) (x^2 - xy + y^2)
Answers
Answered by
1
Answer:
Multiplication of (2x+3y)(x
2
−xy+y
2
)
(2x+3y) : product I
(x
2
−xy+y
2
) : product II
Using associative property of multiplication, each term in bracket 1 , will be multiplied with each term in bracket 2.
=2x(x
2
−xy+y
2
)+3y(x
2
−xy+y
2
)
=2x
3
−2x
2
y+2xy
2
+3yx
2
−3xy
2
+3y
3
=2x
3
+3y
3
+x
2
y−xy
2
Hence, the answer is 2x
3
+3y
3
+x
2
y−xy
2
.
Answered by
1
Answer:
By using the identity of
(x+y)(x²-xy+y²)=x³+y³
(2x+3y)(4x²-6+9y²)=(2x)³+(3y)³
=8x³+27y³
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