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Factorise the following expressions (i) c²-4c-12(ii) y²-10y+25answer me fast please |
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Answer» d Answer:-Given To Factorise:c² - 4c - 12y² - 10y + 25Solution:QUESTION 1:We have, c² - 4c - 12= c² - 6c + 2c - 12 ( -6 + 2 = -4 and -6 × 2 = -12)= c(c - 6) + 2(c - 6)= (c + 2)(c - 6)★ Hence, the factorised form of the given quadratic polynomial is (c + 2)(c - 6)Question 2:We have, y² - 10y + 25= y² - 5y - 5y + 25 (-5 - 5 = -10 and (-5) × (-5) = 25) = y(y - 5) - 5(y - 5)= (y - 5)(y - 5)= (y - 5)²★ Hence, the factorised form of the polynomial is (y - 5)²Answer:Factorised form - (c + 2)(c - 6)Factorised form - (y - 5)² |
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