Graphs for solving equations Y10 (BR)
Solve 2x-1 = -½x+3 Find the x co-ordinate of the point where the line y=2x-1 crosses the line y =-½x+3 Answer x=1.6
Use the graphs to solve the equation 2x-1 = -½x+3
Solve x²+x-7 = -½x+3 Find the x co-ordinate of the points where the curve y=x²+x-7 crosses the line y =-½x+3 Answer x=-4 and x=2.5
Use the graphs to solve the equation x²+x-7 = -½x+3
Draw line y=0 which is the x axis Find the x co-ordinate of the points where the curve y= x²+x-7 crosses the x axis Answer x=2.2 and x=-3.2
Use the graphs to solve the equation x²+x-7 = 0
Solve x²+x-7 = 2x-1 Find the x co-ordinate of the points where the curve y=x²+x-7 crosses the line y =2x-1 Answer x=-2 and x=3
Use the graphs to solve the equation x²+x-7 = 2x-1
To solve x²+3x+5= 0, aim to make the left hand side the same as the curve x²+3x-2. x²+3x+5= 0 ( -7) x²+3x-2=-7 Draw line y=-7
Suppose you have the graph of y=x²+3x-2. What line would you draw on it to solve the equation x²+3x+5= 0
y=0
Suppose you have the graph of y=x²+3x-2. What line would you draw on it to solve the equation x²+3x-2= 0
y=1-5x
Suppose you have the graph of y=x²+3x-2. What line would you draw on it to solve the equation x²+3x-2= 1-5x
y=7
Suppose you have the graph of y=x²+3x-2. What line would you draw on it to solve the equation x²+3x-2= 7
y=x+1
Suppose you have the graph of y=x²+3x-2. What line would you draw on it to solve the equation x²+3x-2= x+1
To solve x²−5x+8= 0, aim to make the left hand side the same as the curve x²+3x-2. x²−5x+8= 0 (+8x) x²+3x+8=8x ( -10) x²+3x-2 = 8x−10 Draw line y=8x−10
Suppose you have the graph of y=x²+3x-2. What line would you draw on it to solve the equation x²−5x+8= 0
Solve x²-3x-2 =15 a)Find the x co-ordinate of the points where the curve y=x²-3x-2 crosses the line y = 15 Answer x=2.9 and x=-5.9 b) Find the x co-ordinate of the points where the curve y=x²-3x-2 crosses the line y =0 Answer x=0.5 and x=-3.5
The graph of y=x²-3x-2 is shown below. Use the graph to solve the equations a) x²-3x-2 =15 b)x²-3x-2 =0
Solve x³-4x²+1 =4 Find the x co-ordinate of the point where the curve y=x³-4x²+1 crosses the line y = 4 Answer x=4.2
The graph of y=x³-4x²+1 is shown below. Use the graph to solve the equation x³-4x²+1 =4