Question

(x+4)(x+7) by identities

Answer 1

Using indentity

${x}^{2} + ( \: a + \: b)x + ab \: = (x + a)(x + b)$
${x}^{2} + 11x + 28$

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Answer 2

hi
x^2+7x+4x+28
x^2+11x+28
hope helps you