From the sum of z3-3 z2-5 z-8 and 4 z3-2 z2-7 z-2 subtract 2 x3-3 z2-z-4

Required #160;polynomial #160;= #160;z3+3z2+5z+8+4z3+2z2 7z 2 2z3 3z2+z 4 #160; #160; #160; #160; #160; #160; #160; #160; #160; #160; ...

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(x±a)(x±b) = x²±(a+b)x+ab.

From the sum ...

Question

From the sum of z³ + 3z² + 5z + 8 and 4z³ + 2z² $-$ 7z $-$ 2 subtract 2x³ $-$ 3z² + z $-$ 4.

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a + b

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