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This is in long division... Plss... say .. solve |
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Answer» d Solution:-QUESTION 1:(x³ + x² - 7x - 3) ÷ (x - 3)Solution:x - 3 ) x³ + x² - 7x - 3 ( x² + 4x + 5 x³ - 3x² (-) (+) ----------------------------- 4x² - 7x - 3 4x² - 12x (-) (+) ----------------------------- 5X - 3 5x - 15 (-) (+) ----------------------------- 12Therefore, Q = x² + 4x + 5R = 12Verification:➡ Dividend = DIVISOR × Quotient + RemainderDivisor × Quotient + Remainder= (x - 3)(x² + 4x + 5) + 12= x³ + 4x² + 5x - 3x² - 12x - 15 + 12= x³ + x² - 7x - 3= Dividend (Verified) Question 2:(3x³ - 2x² + 7x - 5) ÷ (x + 3)Solution:x + 3 ) 3x³ - 2x² + 7x - 5 ( 3x² - 11x + 40 3x³ + 9x² (-) (-) ------------------------------ -11x² + 7x -11x² - 33x (+) (+) ------------------------------ 40x - 5 40x + 120 (-) (-) ------------------------------ -125Therefore, Q = 3x² - 11x + 40R = -125Verification:➡ Dividend = Divisor × Quotient + RemainderDivisor × Quotient + Remainder= (x + 3)(3x² - 11x + 40) - 115= 3x³ - 11x² + 40x + 9x² - 33x + 120 - 125= 3x³ - 2x² + 7x - 5= Dividend (Verified) |
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