Question

expand ( x +3 ) ( x + 7)​

Answer 1

Step-by-step explanation:

x^2 +7x+3x+21

hope it may help U

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Answer 2

$(x + 3)(x + 7) \\ = x \times x + 3x + 7x + 3 \times 7 \\ = x {}^{2} + 10x + 21$

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