7.5A Intersecting graphs

• Wiskunde
• Middelbare school
• havo
• Leerjaar 2

8.5A

Intersecting graphs

Link the correct way of solving to the correct equation

x​2​​+5x=0

x+5=0

x​2​​+12x+20=0

x​2​​=16

Sum product

Square root

Factorise

Balance method

What method do you use to solve this equation?

x​2​​+3x=0

1. Factorise
2. Sum product
3. Balance method
4. Square root

Solve

x​2​​+3x=0

What method do you use to solve this equation?

x​2​​+4x+3=0

1. Factorise
2. Sum product
3. Balance method
4. Square root

Solve

x​2​​+4x+3=0

8.5A

Intersecting graphs

What is the first thing you do to solve this?

x​2​​+6x+4=2x+1

1. Use sum product
2. Make equal to 0
3. Calculate x
4. Sketch the graph

What should you do after solving the equation?

1. Write down the answer
2. Calculate the y-coordinate
3. Write down as a coordinate
4. Sketch the graph

Calculate the coordinates of the point of intersection of

x​2​​+6x+4=2x+1

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