Question

(x+y)(x+3) use identity

Answer 1

Refer to the attachment please.

Answer 2

Answer:

x² + yx + 3x + 3y

Step-by-step explanation:

$(x + y)(x + 3)$

$(x + a)(x + b) = {x}^{2} + (a + b)x + ab$

$= {(x)}^{2} + (y + 3)x + (y \times 3)$

$= {x}^{2} + yx + 3x + 3y$

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