Step-by-step explanation:
try to factor them anx than set each bracket to 0 the negative one would not work
<em>f(3) = 13</em>
<em>f(x) = 2x + 7</em>
<em>replace </em><em>x</em><em> with </em><em>3</em>
<em>f(3) = 2×3 + 7</em>
<em>= 6 + 7</em>
<em>= 13</em>
