What does the and 2 mean? Does it mean times two or plus two?
Step-by-step explanation:
Answer:
Option C. 4.2 units
Step-by-step explanation:
Diagonals of a square intersect each other at 90°.
Therefore, From the right angle triangle formed at the center will be,
(Length of square)² = 3² + 3² [By Pythagoras theorem}
Length of the square =
= 4.24 units
≈ 4.2 units
Option C is the answer.
Because we have two values of x, we can set the two expressions equal to each-other.
x^2 + 6x + 9 = x + 3
Subtract x and 3 from both sides.
x^2 + 5x + 6 = 0
Now that we have all terms on one side, we can find the values of x.
Using the AC method, we can simplify this equation to (x + 2)(x + 3)
The solutions to the system of equations presented are:
<h3>x = -2, x = -3.</h3>
The trick here is to notice that all 3 terms can be div. by 2:
2(x^2 + x - 12)
Note that -12 factors into -3 * 4 or -4 * 3. Thus,
x^2 + x - 12 = (x-4)(x+3), and so <span>2x2 + 2x − 24 = 2(x-4)(x+3).</span>
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