What is expand 7(x+Δx)^2-7x-7 ?

The solution to expand 7(x+Δx)^2-7x-7 is 7x^2+14Δx^2+7Δ^2x^2-7x-7

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expand 7(x+Δx)^2-7x-7

expand

7 (x + Δ x)^{2} - 7 x - 7

7 x^{2} + 14Δ x^{2} + 7 Δ^{2} x^{2} - 7 x - 7

Solution steps

7 (x + Δ x)^{2} - 7 x - 7

(x + Δ x)^{2} = x^{2} + 2Δ x^{2} + Δ^{2} x^{2}

= 7 (x^{2} + 2Δ x^{2} + Δ^{2} x^{2}) - 7 x - 7

Expand

7 (x^{2} + 2Δ x^{2} + Δ^{2} x^{2}) : 7 x^{2} + 14Δ x^{2} + 7 Δ^{2} x^{2}

= 7 x^{2} + 14Δ x^{2} + 7 Δ^{2} x^{2} - 7 x - 7

\frac{( 2 x - 3 ) ( 5 x + 2 )}{x - 1}

z^{2} + 5 z

(- 1) (x)

3 (- 2 + 1 f \circ g) + 5

y^{2} d c - (x^{2} + x y) d y

What is expand 7(x+Δx)^2-7x-7 ?
The solution to expand 7(x+Δx)^2-7x-7 is 7x^2+14Δx^2+7Δ^2x^2-7x-7