Answer:
Step-by-step explanation:
hello :
the x-intercepts when : y=0 means : 2x²--8x+5 =0
∆ = b² -4ac a=2 and b= -8 and c= 5
∆ = (-8)² -4(2)(5) = 64-40 =24
∆ >0 this equation has two solutions so : two x-intercepts
The answer is <span>D. –1 + 2 = 1
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Answer:
f = 1
Step-by-step explanation:
Answer:
The number is -2.
Step-by-step explanation:
From the word problem, we can figure out the equation for the unknown number (x).
8x-3=-19
We would then work out the equation to find x.
Add 3 to -19.
8x=-16
Divide -16 by 8.
x=-2
Step-by-step explanation:
a) Let y = f(x) = 3x - 2x^2
f(-2) = 3(-2) - 2(-2)^2 = p
= -6 - 8
= -14
= p
f(2.5) = 3(2.5) - 2(2.5)^2 = q
= 7.5 - 12.5
= -5
= q
b) graphing
c) From the graph, you should be able to verify the following:
i) f(0.5) = 3(0.5) - 2(0.5)^2 = 1
ii) 0.5 = 3x - 2x^2 or x = 1.3, 0.2
iii) the maximum occurs at
f(0.75) = 1.125
d) the equation for the line of symmetry is x = 0.75
