C1 - Quadratics 2.0 / 5 based on 1 rating ? MathematicsQuadraticsASEdexcel Created by: jackjj9Created on: 10-10-16 21:25 What is the quadratic form? ax2 + bx + c = 0 1 of 22 When a is positive, what is the shape of the graph? Happy, positive face 2 of 22 When a is negative, what is the shape of the graph? Sad, negative face 3 of 22 What is the formula to find the line of symmetry in x? -b/2a 4 of 22 What do you do to find the minimum point? Substitute in -b/2a for x 5 of 22 What do you do to find the x intercepts (roots) sub in y=0 and solve 6 of 22 What is the discriminant of x? b2 - 4ac 7 of 22 When b2-4ac = 0, where does the curve touch the x axis? It touches it in one place - has equal roots 8 of 22 When b2-4ac is greater than 0, where does the curve touch the x axis? It intercepts in two places - has 2 real roots 9 of 22 When b2-4ac is less than 0, where does the curve touch the x axis? Nowhere - there are no real roots 10 of 22 What is the quadratic formula? [-b+-root(b2-4ac)]/2a 11 of 22 What is the form of completing the square? A(X+B)^2-C 12 of 22 In what form do you usually leave the solutions to the quadratic formula? Surds 13 of 22 What can be said about the relationship between the x axis and y axis to a reciprocal graph? The reciprocal graph is asymptotic to the axes. 14 of 22 What is the asymptote line? The line that a f(x) will never meet 15 of 22 In what quadrant(s) will the graph of y=1/x be in? Top right and bottom left 16 of 22 In what quadrant(s) will the graph of y=-1/x be in? Top left and bottom right 17 of 22 If y=k/x is graphed and the value is k increases, does the the curve move further away or closer to the axes? Further away from both the x and y axes, in both quadrants 18 of 22 What is the shape of positive a cubic graph? An S shape 19 of 22 What is the shape of a negative cubic graph? A backwards S shape 20 of 22 How do you find the points of intersection of two curves? Set the functions (equations) equal to each other and solve for x. Then sub in the values of x and solve for y. 21 of 22 The number of intersections corresponds to the number of, what? Solutions 22 of 22
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