Math, asked by mdanishdxd, 8 months ago

plzz helpp fast
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Answered by mhanifa

0

Answer:

8-4a

Step-by-step explanation:

f(x)=4x-x²

f(a+1)-f(a-1)=
4(a+1)-(a+1)²- 4(a-1)+(a-1)²=
4a+4-4a+4+(a-1)²-(a+1)²=
8+(a-1+a+1)(a-1-a-1)=
8+2a*(-2)=
8-4a

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