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JulijaS [17]
3 years ago
5

Can someone help me for this....​

Mathematics
1 answer:
ivolga24 [154]3 years ago
7 0

Answer:b=3

Step-by-step explanation:

\begin{array}{c|c|c|c|c|c|c|c}&x^6&x^5&x^4&x3&x^2&x&1\\---&---&---&---&---&---&---&---\\&1&b&0&-2&0&-5&6\\x=-2&&-2&-2b+4&4b-8&-8b+20&16b-40&-32b+90\\---&---&---&---&---&---&---&---\\&1&b-2&-2b+4&4b-10&-8b+20&16b-45&-32b+96=0\\\end {array}\\\\\\-32b+96=0\\\\b=\dfrac{96}{32} \\\\\boxed{b=3}\\

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