Step-by-step explanation:
<h3>Factorize : 9x² - y² </h3>
<h3>Applied Formula = a²- b² = (a + b ) (a - b)</h3>
<h3>9x²- 1 y² : </h3>
<h3> = (3x)²– (y)² [ (3x)² = 9x² ]</h3>
<h3> = (3x+y) (3x–y)</h3>
Answer:
4. No because 2×4=8 but 5×4 doesn't equal 18
Answer:
isn't that a square or is it called sum eles-
Step-by-step explanation:
Answer:
Step-by-step explanation:
The negative coefficient of x^2 tells you the parabola opens downward. (Any even-degree polynomial with a negative leading coefficient will open downward.)
Going through the steps for completing the square, we ...
1. Factor out the leading coefficient from the x-terms
-1(x^2 +14x) +1
2. Add the square of half the x-coefficient inside parentheses, subtract the same amount outside parentheses.
-1(x^2 +14x +49) -(-1·49) +1
3. Simplify, expressing the content of parentheses as a square.
-(x +7)^2 +50
4. Compare to the vertex form to find the vertex. For vertex (h, k), the form is
a(x -h)^2 +k
so your vertex is ...
(h, k) = (-7, 50) . . . . . . . . . a = -1 < 0, so the curve opens downward. The vertex is a maximum.
The maximum value of the expression is 50.