Question

iv) a² + b2-c?, -a? + b2-c2​

Answer 1

Answer:

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Answer 2

$(a + b + c) {}^{2} = a {}^{2} + b {}^{2} + c {}^{2} + 2ab + 2bc + 2ca.$

$(a + b + c) {}^{2} = a {}^{2} + b {}^{2} + c {}^{2} + 2(ab + bc + ca.)$