Answer:
3
Step-by-step explanation:
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<span>What are the factors of y=4x^2 + 2x - 30?
First, divide 2 out of this expression. y = 2(2x^2 + x - 30)
One way to factor this would be to find the roots using the quadratic formula:
Since a=2, b=1 and c= -15,
-1 plus or minus sqrt(1^2-4(2)(-15)
x = -------------------------------------------------
4
-1 plus or minus sqrt(121) -1 plus or minus 11
= -------------------------------------- = ----------------------------
4 4
One such solution is -12/4, or -3. The corresponding factor is (x+3), and the other is 5/2, leading to the factor (2x-5).
Therefore, </span><span>4x^2 + 2x - 30 = y = 2(2x-5)(x+3).</span>
Answer:
a)
2(x+1) +3 (x+2)
2x +2 + 3x +6
5x + 8
b)
4(x+3) +2(x +7)
4x+12 + 2x +14
6x+26
c)
5(x+3) +2(x+7)
5x+15 +2x+14
7x +29
d)
8(x+10) +2(x+4)
8x+80 +2x+8
10x+88
Step-by-step explanation:
Answer: 12
The lowest common multiple (LCM) of 3 and 4 is 12
