The answer is the second one. 27=x^3
P(1) = P(-1)
P(1) = 3 - a + b
P(-1) = -3 + a + b
-> 3 - a + b = -3 + a + b
-> 3 - a + b + 3 - a - b = 0
-> 6 - 2a = 0
-> a = 3.
P(2) = 24 - 2a + b -> 24 - (2a - b) = 16 -> 2a - b = 8
-> 6 - b = 8
b = -2.
So, a = 3 and b = -2
Recheck : P(1) = 3 - 3 + (-2) = -2
P(-1) = -3 + 3 + (-2) = -2 => P(1) = P(-1) (true)
P(2) = 24 - 6 + (-2) = 16.
Answer is B- you might begin to visualize the story.
4b^2 - 16 =
4(b^2 - 4) =
4(b + 2)(b - 2)
Hello,
2x - one over four of (12x + 4) = 3
must be written:
2x-1/4 *(12x+4)=3
And we see a sign '-' before 1/4.
Step 1:
2x-(3x+1)=3 or 2x-3x-1=3 and not 2x+3x-1=3
Answer A
since Step 1, because incorrect signs have been used
And here, Mehek are there sufficients explanations?
