• 2021 April(Z04) Math Question 41

    Quadratic Equations

    - Factoring

    Quadratic equations
    Choice A
    24x2+2x=1524x^2+2x=15
    24x2+2x−15=024x^2+2x-15=0
    24x2+20x−18x−15=024x^2+20x-18x-15=0
    4x(6x+5)−3(6x+5)=04x(6x+5)-3(6x+5)=0
    (6x+5)(4x−3)=0(6x+5)(4x-3)=0

    We can write this as

    (6x+5)=0,(4x−3)=0(6x+5)=0\quad,\quad (4x-3)=0
    6x=−5,4x=36x=-5\quad,\quad 4x=3
    x={−5}{6},x={3}{4}x=\frac\{-5\}\{6\}\quad,\quad x=\frac\{3\}\{4\}

    From these two solutions of above equation we can clearly tell that 3/5 is greater than -5/6.

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