Heeran Ravindran's answer to Cheryl's Secondary 3 E Maths Singapore question.
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Hi! I believe there is a typo in part (c). It should be "minimum point" instead of a "maximum point". This is because:
If we expand the equation of y=-(3-x)(x+1), we get
y = x^2 -2x - 3
Since the coefficient of x^2 is positive, it should be a smiley face graph and therefore a minimum point as seen in the drawing.
Hope I helped in some way! Happy studying! :D
If we expand the equation of y=-(3-x)(x+1), we get
y = x^2 -2x - 3
Since the coefficient of x^2 is positive, it should be a smiley face graph and therefore a minimum point as seen in the drawing.
Hope I helped in some way! Happy studying! :D
Date Posted:
3 years ago
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