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(a-b)^2 Expansion and Visualisation

Use a suitabl...

Question

Use a suitable identity to get the product :
$(2 a - 7) (2 a - 7)$

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Solution

$(2 a - 7) (2 a - 7)$ = $(2 a - 7)^{2} = 4 a^{2} - 28 a + 49$

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