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S find all heroes of the polynomial pla)= x+20 if (x+2) is a factor of p(x).9-12 |
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Answer» it will be clear for u thanks my pleasure sorry for sending to much answer x^3 - 9x^2 - 12x + 20 = 0x^3 + 2x^2 - 11x^2 - 22x + 10x + 20 = 0x^2(x + 2) - 11x(x + 2) + 10(x + 2) = 0(x + 2)(x^2 - 11x + 10) = 0(x + 2)(x2 - 10x - x + 10) = 0(x + 2)(x(x - 10) - 1(x - 10)) = 0(x + 2)(x - 1)(x - 10) = 0x = - 2, 1, 10 Therefore,Other two zeroes are 1 and 10 ab mat bhejo |
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