Simplify and then solve by factorisation 3x(x+2)-7=2, to find x.
3x(x+2)-7=2 3x2+6x-7=2 3x2+6x-9=0 3(x2+2x-3)=0 [Divide by 3] (x2+2x-3)=0 (x+3)(x-1)=0 x= -3 x=1
IM
Related Maths GCSE answers
All answers ▸Define a surd and find the length of one side of a 50cm^2 square shape in surd form
Work out the value 125^(-2/3) (A* Exam Q)
A square, with sides of length x cm, is inside a circle. Each vertex of the square is on the circumference of the circle. The area of the circle is 49 cm^2. Work out the value of x. Give your answer correct to 3 significant figures.
A ball of mass m is thrown with velocity of (7i + 4j) m/s from a height of 1m. After some time it hits the ground. Find the: a) ball's maximum height b) speed it hits the ground c) distance travelled