Kai Chew's answer to Macdaddy's Secondary 3 E Maths Singapore question.
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(a) y = x^2 + 2x + k
sub in x =-3 and y=0
0 = (-3)^2 + 2(-3) + k
0 = 9 - 6 + k
k = 3
sub in x =-3 and y=0
0 = (-3)^2 + 2(-3) + k
0 = 9 - 6 + k
k = 3
Date Posted:
1 year ago
* k= -3
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