If f(x) = x² + 5, find f(x + 2) - f(x - 2).
Answers
Answered by
6
Answer:
8x
Step-by-step explanation:
f(x)=x² +5
put x=x+2
f(x+2)=(x+2)² +5
=x²+4+2x+5
=x²+4x+9
put x=x-2
f(x-2)=(x-2)²+5
=x²+4-2x+5
=x²-4x+9
f(x+2)-f(x-2)=x²+4x+9-(x²-4x+9)
=x²+4x+9-x²+4x-9
=8x
Answered by
1
Answer:
8x
Step-by-step explanation:
f(x) = x²+5
f(x+2) = (x+2)²+5
= x²+4+4x+5
= x²+4x+9
f(x-2) = (x-2)²+5
= x²+4-4x+5
= x²-4x+9
f(x+2) - f(x-2) = (x²+4x+9)-(x²-4x+9)
= x²+4x+9-x²+4x-9
= 8x
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