Question

`(5 {x }^(2) + 2 {y}^(2) ) * (3 {x}^(2) - 7 {y}^(2))`
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Answer 1

`15x^4 - 29x^2y^2 - 14y^4`.

Explanation:

(5x^2 + 2y^2) * (3x^2 - 7y^2)

= 15x^4 + 6x^2y^2 - 35x^2y^2 - 14y^4

= 15x^4 - 29x^2y^2 - 14y^4

=
`15x^4 - 29x^2y^2 - 14y^4`

Hope this helps!