Question

1.(5-2x)(3+x)
2.(x-7y(7x-y) ​

Answer 1

Answer:

1)-2x^2-x+15

2)7x^2-8xy+7y^2

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Answer 2

Step-by-step explanation:

$(5 - 2x)(3 + x) \\ = 5(3 + x) - 2x(3 + x) \\ = 15 + 5x - 6x - 2 {x}^{2} \\ = 15 - x - 2 {x}^{2} \\ \\ 2.(x - 7y)(7x - y) \\ = x(7x - y) - 7y(7x - y) \\ = 7 {x}^{2} - xy - 49xy + 7 {y}^{2} \\ = 7 {x}^{2} - 50xy + 7 {y}^{2}$