Which expression is equivalent to 4{12 + 5} + 3?
1 answer:
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P(-15)
s(-2)
=x(x-5)+3(x-5)
=(x+3)(x-5)
x=5
Answer:
x = -7
Step-by-step explanation:
Our function is . Notice that our possible roots are when x + 4 = 0 and when x + 7 = 0. So, our roots are -4 and -7.
However, the power above x + 4 is even, meaning the graph will simply <em>touch</em> the x-axis at x = -4, but not pass through. The power above x + 7, though, is odd, which means the graph will <em>cross</em> the x-axis.
Thus, the answer is x = -7.