How do you solve a quadratic equation?
For example x2 - 2x - 35 = 0You would have two approaches to this question. You can either use the quadratic formula or you could simplify the expression. Using the formula you would have x = (2+or- (4-4x1x-35)1/2)/(2x1), giving you x = 7 and x = -5. Similarly you could simplify the expression. The product of the two roots should equal -35 and their sum should equal -2. We can then write x2-2x-35 as (x+5)(x-7), so that we get the answer x =7 and x=-5.
BT
Related Maths GCSE answers
All answers ▸v^2=u^2+2as, make "a" the subject of the formula.
Line A passes through point Q(2,3). Line B is parallel to line A and has the equation 2y-3x=4. What is the equation of line A?
Please explain (said question) surrounding a proof of 2 equal angles
solve simultaneous equations: 2x² + 3y² = 14 , x = 2y-3