Question

Applying a suitable identity find the product of (x-y),(x+y) and (xsquare+ysquare)

Answer 1

The product of  (x - y), (x + y) and ($x^{2}$ + $y^{2}$) is "($(x^{2}) ^{2}$ - $(y^{2}) ^{2}$)".

Step-by-step explanation:

We have,

(x - y)(x + y) · ($x^{2}$ + $y^{2}$)

= ($x^{2}$ - $y^{2}$) · ($x^{2}$ + $y^{2}$)

[Using identity, (a + b)(a - b) = ($a^{2}$ - $b^{2}$)

= ($(x^{2}) ^{2}$ - $(y^{2}) ^{2}$)

[Again using identity, (a + b)(a - b) = ($a^{2}$ - $b^{2}$) ]

Hence, the product of  (x - y), (x + y) and ($x^{2}$ + $y^{2}$) is "($(x^{2}) ^{2}$ - $(y^{2}) ^{2}$)".

Answer 2

Answer:84

Step-by-step explanation:(12.1+7.9)(12.1-7.9)

20×4.

84