Cari's answer to Amanda's Secondary 4 A Maths question.
what is the first equation?
Sub (0,0)
So y=0, x=0
The first eqn: d=0
So y=0, x=0
The first eqn: d=0
but how does that help to solve a,b and c? my 2nd equation is 12a+4b+c=0 and 3rd equation is 8a+4b+2c=-4
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