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Question ⤵Without actual division, prove that Is exactly divisible by No spams needed. Quality Answers needed. A. S. A. P. |
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Answer» Step-by-step explanation: suppose x⁴+2x³-2x²+2x-3 = F(x) x²+2x-3 = 0 => x²+(3-1)x-3 = 0 => x²+3x-x-3 = 0 => x(x+3)-1(x+3) = 0 =>(x+3)(x-1) = 0 => x = -3 => x = 1 -3 and 1 are the ROOTS of x²+2x-3 = 0 if x⁴+2x³-2x²+2x-3 is divisible by x²+2x-3 then f(-3) and f(1) = 0 f(-3) = (-3)⁴+(2*(-3)³)-(2*(-3)²)+(2*(-3))-3 = 81+(2*(-27))-(2*9)-6-3 = 81-54-18-6-3 = 81-81 = 0 f(1) = (1)⁴+(2*(1)³)-(2*(1)²)+(2*(1))-3 = 1+2-2+2-3 = 5-5 = 0 this is proved that x⁴+2x³-2x²+2x-3 is divisible by x²+2x-3 |
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