11)in the quadratic function f() = 3(x + 2)2 - 6, what is the constant term? A. 6 B. 12 C. -6 D.-12
12)Which of the following equation is equivalent to f(x) = 2(x - 1)2 +5?
A. f(x)=2x2 - 4x + 7
C. f(x) = 2x2 + 4x - 7
B. f(x) = 2x2 - 4x - 7
D. f(x) = 2x² + 4x +7
13) The quadratic function f(x) = x² + 4x - 1 when expressed in vertex form f(x) = a(x - h)2 + k is ?
A. f(x) = (x + 2)+5
C. f(x) = (x - 2)2 +5
B. f(x) = (x + 2)2 - 5
D. f(x) = (x - 2)2 - 5 A
14) How many zeros does a quadratic function have?
C. at most two
A. two
B at least two
D. one udratic function
12)Which of the following equation is equivalent to f(x) = 2(x - 1)2 +5?
A. f(x)=2x2 - 4x + 7
C. f(x) = 2x2 + 4x - 7
B. f(x) = 2x2 - 4x - 7
D. f(x) = 2x² + 4x +7
13) The quadratic function f(x) = x² + 4x - 1 when expressed in vertex form f(x) = a(x - h)2 + k is ?
A. f(x) = (x + 2)+5
C. f(x) = (x - 2)2 +5
B. f(x) = (x + 2)2 - 5
D. f(x) = (x - 2)2 - 5 A
14) How many zeros does a quadratic function have?
C. at most two
A. two
B at least two
D. one udratic function
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Answer:
11. A. 6
> f(x)=3(x+2)²-6=0
> 3(x²+4x+4)-6=0
> 3x²+12x+12-6=0
> 3x²+12x+6=0
12. A. f(x)=2x²-4x+7=0
> f(x)=2(x-1)²+5=9
> 2(x²-2x+1)+5=0
> 2x²-4x+2+5=0
> 2x²-4x+7=0
13. B. f(x)=(x+2)²-5
> f(x)=x²+4x-1
> y+?=x²+4x-1
> y+?=(x²+4x+(4/2)²)-1
> y+4=(x²+4x+4)-1
> y+4=(x+2)²-1-4
> y=(x+2)²-5
14. A. two