2021 June(D06) Math Question 56
Quadratic Equations
- FOIL
(x+5)(x−34)=0(x+5)(x-\frac{3}{4})=0(x+5)(x−43)=0
=>(x+5)(x−34)×4=0=> (x+5)(x-\frac{3}{4})\times4=0=>(x+5)(x−43)×4=0
=>(x+5)(4x−3)=0=> (x+5)(4x-3)=0=>(x+5)(4x−3)=0
=>4x2−3x+5×4x−5×3=0=> 4x^2-3x+5\times4x-5\times3=0=>4x2−3x+5×4x−5×3=0
=>4x2+17x−15=0=> 4x^2+17x-15=0=>4x2+17x−15=0
=>4x2+17x−15=y=> 4x^2+17x-15=y=>4x2+17x−15=y
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