Curves:
solving
The graphs of
y = x
2
+ ax + b
y = x
2
+ cx + d
only cross each other once. Use the graphs to solve the simultaneous equations given below.
y = x²+2x,
y = x²+x
y = x²-2x+1,
y = x²-4x
y = x²+2x+4,
y = x²+4x
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