Answer:
30
Explanation:
Given that,
f ( x ) = x² + x
To find the value of f(-6), replace x with -6 and solve the expression.
Let us solve it now.
f ( - 6 ) = (-6)² + (-6)
f ( - 6 ) = 36 - 6
f ( - 6 ) = 30
f(-6) = 30
f(x)=x^2+x
Let x = -6
f f(-6)=(-6)^2+(-6)
= 36 -6
= 30
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