Question

answer only if u know

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Answer 1

Answer:-

$(i) \: (a {}^{2} + 2b { }^{2} ) \times (b - 5) = a \times (b - 5) + 7 \times (b - 5) \\ = ab - 5a + 7b - 35$

$(i) \: (a {}^{2} + 2b {}^{2} ) \times (5a - 3b) = a {}^{2} (5a - 3b) + 2b {}^{2} (5a - 3b) \\ = 5a {}^{3} - 3a {}^{2} b + 10ab {}^{2} - 6b {}^{3}$

Answers proved for 1 and 2

Answer 2

ab -5 a +7b-35 ¡

5a^3-3a^2b+10b^2a -6b^3