c) 4 = 0 x2 – 3) Solve the following equations either by factorising or by using the formula: a) 6x2 - 5x 4 = 0 b) 8x2 24x + 10 = 0 – – 4) Use the formula to solve the following equations to 3 significant figures. Some of the equations be solved. can’t a) +7x +9 = 0 b) 6 + 3x = 8x2 x2 c) 4x2 7 = 0 d) 3x + 18 = 0 x x2 – – – e) 3x2 + 4x + 4 = 0 f) 3x2 = 13x 16 – Chapter 7: INDICES Basic rules of indices . 4 is called the index (plural: indices), power or exponent of y.
c) 4 – x2 = 0 3) Solve the following equations either by factorising or by using the formula: a) 6x2 - 5x – 4 = 0 b) 8x2 – 24x + 10 = 0 4) Use the formula to solve the following equations to 3 significant figures. Some of the equations can’t be solved. a) x2 +7x +9 = 0 b) 6 + 3x = 8x2 c) 4x2 – x – 7 = 0 d) x2 – 3x + 18 = 0 e) 3x2 + 4x + 4 = 0 f) 3x2 = 13x – 16 Chapter 7: INDICES Basic rules of indices . 4 is called the index (plural: indices), power or exponent of y.