Question

Help me with this

`3x + (x + 7)(2x - 1)`
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Answer 1

Explanation:

3x + (x + 7)(2x - 1) =

3x + (2x²-x+14x-7) =

3x + 2x²+13x-7 =

2x²+16x-7

Answer 2

`\\ \sf\longmapsto 3x+(x+7)(2x-1)`

`\\ \sf\longmapsto 3x+(x(2x-1)+7(2x-1))`

`\\ \sf\longmapsto 3x+2x^2-x+14x-7`

`\\ \sf\longmapsto 2x^2+3x+13x-7`

`\\ \sf\longmapsto 2x^2+16x-7`