Question

multiply to find each product.
$(5 {s}^{2} + 8) \: (7 {s }^{2} + 9)$
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Answer 1

(5s^2+8)(7s^2+9)
= 5s^2 (7s^2 + 9)+8 (7s^2 + 9)
=35s^4 + 45s^2 + 56^2s + 72
=35s^4 + 111s^2 + 72