Mathematics
boylsongirl
61

I need help to solve this question step by step

+6
(1) Answers
Hillary2468

a) -3 or -2 and 2/3 working: (x + 3)(3x + 8) = 0 (x + 3) = 0 or (3x + 8)=0 x = -3 or x = -8/3 x = -3 or x = -2 and 2/3 ========================================= b) 1 and 3/5 working: 5x^2 - 8x = 0 x(5x - 8) = 0 5x - 8 = 0 5x = 8 x = 8 / 5 x = 1 and 3/5 ========================================= c) -3/4 or -4 working: 4x^2 - 19x + 12 = 0 (using the cross method) (4x + 3)(x + 4) = 0 (4x + 3) = 0 or (x + 4) = 0 x = -3/4 or x = -4 ======================================== Also, just in case, the picture shows the cross method I used in (c)

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