f(x)=x2+3x𝑓(𝑥)=𝑥2+3𝑥f(−4)=
Solution
To find the value of the function f(x) = x^2 + 3x at x = -4, you substitute -4 in place of x in the function.
Step 1: Substitute x = -4 into the function f(-4) = (-4)^2 + 3*(-4)
Step 2: Simplify the equation f(-4) = 16 - 12
Step 3: Solve the equation f(-4) = 4
So, f(-4) = 4.
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