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Factorise: (i) 15(5x - 4)2 - 10(5x - 4)(ii) 3a2x - bx + 3a2-b(iii) b(c- d)2 + ad -c) + 3(c - d)(iv) ax2 + b2y - ab2 – x2y(v) 1 - 3x – 3y - 4(x + y)2 |
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Answer» 25x 2 +16−40x)−10(5x−4)=375x 2 +240−600x−50x+40=375x 2 −650x+280=5(75x 2 −130x+56)=5(75x 2 −60x−70x+56)=5(15x)(5x−4)−(14)(5x−4)=5(15x−14)(5x−4) (ii) 3a2 x - bx + 3a2 - b = x (3a2 - b) + 1 (3a2 - b) = (x + 1) (3a2 - b)(III) (IV) see in photo(v) see in photo |
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