Respuesta :

Easy, showing work,

using the method FOIL (First,Outer,Inner, Last)

Take, (x+3)(x+5) and multiply,

First,

x*x=[tex] x^{2} [/tex]

Outer,

x*5=5x

Inner,

3*x=3x

Last,

3*5=15

Add the terms together,

[tex] x^{2} [/tex]+8x+15   ([tex] x^{2} [/tex]+5x+3x+15)

Thus, your answer.
Alex200114
x²+15 x multiplied by x equals x² and 3 multiplied by 5 equals 15 and there's only a plus sign thus x² +15