I think its d but you cant see all of the question.<span />
Answer:
33/4 or 8 1/4
Step-by-step explanation:
-3 2/3 • (-2 1/4)
Step 1. Convert each into improper fractions
(Reply for details)
-11/3 • (-9/4)
Step 2. Multiply
(Reply for details)
99/12
Step 3. Simplify
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33/4 or 8 1/4
I'm pretty sure the 3rd one is right, use a calculator
<span><u>Answer</u>
25c^2-4/9
<u>Explanation</u>
In this question you are expected to expand (5c+2/3)(5c-2/3)
(5c+2/3)(5c-2/3)=(5c×5c)-(5c×2/3)+(5c×2/3)-(2/3×2/3)
=25c^2-10c/3+10c/3-4/9
25c^2-4/9
The expanded form of (5c+2/3)(5c-2/3) is 25c^2-4/9 and this is what the question requires of you to do.</span>
We notice a factor of 2x in both
2x(5x^2+4x-3)
trial and error
(5x-3)(x+1) yeilds 5x^2+2x-3, nope
(5x+3)(x-1) yeilds 5x^2-2x-3, nope
(5x-1)(x+3) yeilds 5x^2+14x-3, nope
(5x+1)(x-3) yeilds 5x^2-14x-3, nope
simplest form is
2x(5x^2+4x-3)
