if 2 is a 0 of both the polynomial, 3x Square+ ax-14 and 2x-b then a-2b=
please give me answers with step by step
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3x²+ax-14=0
3(2)²+a(2)-14=0
12+2a-14=0
2a=2
a=1
2x-b=0
2(2)-b=0
4=b
a-2b=0
1-2(4)=0
1-8=0
7=0
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