Answer:
1. k^2+2k-24
1A. (k - 4) (k + 6)
2. 4k^2-1
2A. (2k + 1) (2k - 1)
3. 25b^2-30b+9
3A. (5b - 3)^2
4. x^2+11x+28=0
4A. x = (-4) OR (-7)
5. (3a+8)(3a^2-a-7)
5A. 9a^2 + 21a^2 - 29a - 56
Step-by-step explanation:
1. k^2+2k-24
Factor using the AC factoring method.
k^2 = 2k
2k + 2k - 24
(k - 4) (k +6)
2. 4k^2-1
Use the Difference of Squares Formula: a^2 - b^2 = (a + b)(a - b)
2k = a
1 = b
(2k + 1)(2k - 1)
3. 25b^2-30b+9
Use the perfect square rule
(5b - 3)(5b - 3)
(5b - 3)^2
4. x^2+11x+28=0
Factor, by setting each factor equal to 0
x^2+11x+28=0
(x + 4)(x + 7) = 0
x = (-4) OR (-7)
5. (3a+8)(3a^2-a-7)
Simply, multiply each term in the first expression by each term in the second expression, and then simplify.
(3a+8)(3a^2-a-7)
9a^2 + 21a^2 - 29a - 56
Answer:
1.(k−4)(k+6)
Explain:Factor k2+2k−24
k2+2k−24
=(k−4)(k+6)
2.(2k+1)(2k−1)
Factor 4k2−1
4k2−1
=(2k+1)(2k−1)
3.(5b−3)(5b−3)
Explain: Factor 25b2−30b+9
25b2−30b+9
=(5b−3)(5b−3)
4.x=4 or x=-7
Let's solve your equation step-by-step.
x2+11x+28=0
Step 1: Factor left side of equation.
(x+4)(x+7)=0
Step 2: Set factors equal to 0.
x+4=0 or x+7=0
x=−4 or x=−7
is 5 to help solve or are they questions to?
Step-by-step explanation:
