Question

(e) (x + 1)2 + (x + 2)2 – 13​

Answer 1

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FORMULA USED

❥(a+b)²

❥a²+ 2ab+ b²

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$(x + 1) {}^{2} + (x +2 ) {}^{2} - 13 \\ (x {}^{2} + 2 \times x \times 1 {} + 1 {}^{2}) +( x {}^{2} \times 2 \times x \times 2 + 2 {}^{2} ) - 13 \\ x {}^{2} + 2x + 1 {}^{2 } + x {}^{2} + x {}^{2} + 4x + 4 - 13 \\ 3x {}^{2} + 6x + 1 {}^{2} - 9$

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