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1) 5x^{2} – 125 = 0
x = ,
2) (x – 7) ( x + 3) = 0
x = ,
3) x^{2} – 5x + 6 = 0
x = ,
4) x(x + 5) = 0
x = ,
5) x^{2} + 3x – 10 = 0
x = ,
6) x^{2} + 6x + 9 = 0
x =
7) 8x^{2} – 11x – 35 = 0
x = , ANS. to 1 d.p
8) 9x^{2} + 30x + 25 = 0
x = /
9) x^{2} – 4x = 0
x = ,
10) 4x^{2} – 12x + 9 = 0
x = /