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प्रश्न
Simplify:
(x + y)3 − (x − y)3
उत्तर
It is known that,
a3 − b3 = (a − b)(a2 + ab + b2)
(x + y)3 − (x − y)3
(x + y)3 − (x − y)3 = {(x + y) − (x − y)}{(x + y)2 + (x + y)(x − y) + (x − y)2}
= 2y(x2 + 2xy + y2 + x2 − y2 + x2 − 2xy + y2)
= 2y (3x2 + y2)
= 2y × 3x2 + 2y × y2
= 6x2y + 2y3
संबंधित प्रश्न
Simplify:
\[\frac{8 x^3 - 27 y^3}{4 x^2 - 9 y^2}\]
Simplify:
\[\frac{m^2 - n^2}{\left( m + n \right)^2} \times \frac{m^2 + mn + n^2}{m^3 - n^3}\]
Simplify:
\[\frac{x^2 - 5x - 24}{\left( x + 3 \right)\left( x + 8 \right)} \times \frac{x^2 - 64}{\left( x - 8 \right)^2}\]
Simplify:
\[\frac{3 x^2 - x - 2}{x^2 - 7x + 12} \div \frac{3 x^2 - 7x - 6}{x^2 - 4}\]
Simplify:
\[\frac{4 x^2 - 11x + 6}{16 x^2 - 9}\]
Factorise:
125y3 − 1
Simplify:
(3xy − 2ab)3 − (3xy + 2ab)3
Factorise: 27p3 - 125q3.
Factorise: `a^3 - 1/(a^3)`
Factorise the following:
a6 – 64
