Equations (Quadratics) 0.0 / 5 ? MathematicsQuadratic equationsGCSEEdexcel Created by: MadisonxoCreated on: 08-05-16 14:35 What do the numbers in a quadratic factorisation add and multiply to make? (a)x²-(b)x+(c)=0 Add to make (b) and multiply to make (c). 1 of 10 Factorise the quadratic: x²-9x+20=0 (x-4)(x-5)=0 2 of 10 What does x= in the factorised quadratic: (x-10)(x+1) ? x=10 and x=-1 3 of 10 What do you do if you have to work out this harder quadratic? 6x²-5x-6 6x-6=-36. This shows that we want two numbers that multiply to -36 and add to make -5. 4 of 10 Complete the quadratic: 6x²-5x-6. (6) x (-6)=-36. 6x²-9x+4x-6. 3x(2x-3)+2(2x-3). (3x+2)(2x-3). CHECK. 5 of 10 Complete the quadratic: 3x²-4x-15 (3) x (-15) =-45. 3x²-9x+5x-15. 3x(x-3)+5(x-3). (3x+5)(x-3). 6 of 10 How to do : sinx=1/2 x=sin^-1(1/2). =30°. (draw graph) x=30° x=150° 7 of 10 Complete the quadratic: 6x²-7x-3=0 6x²-9x+2x-3=0. 3x(2x-3)+1(2x-3)=0. (3x+1)(2x-3)=0. x=1/3. x=3/2. 8 of 10 Name the methods for drawing a quadratic graph. Table of values. Calculator. Algebra. 9 of 10 What is the quadratic formula? x=-b±√b²-4ac/2a 10 of 10
Comments
No comments have yet been made