Y is 2 and x is 3.
3 X 3 = 9-2 =7
Answer:
2x(x+y)(x-y)
Step-by-step explanation:
Given the expression;
(x+y)² + 2(x+ y)(x- y) + (x– y)²
Factorize
(x+y)² + (x+ y)(x- y) + (x+ y)(x- y) + (x– y)²
= (x+y)[x+y+(x-y)] +(x-y)[(x+y)+(x-y)]
= (x+y)(x-y)(x+y+(x-y))
= (x+y)(x-y)(x+y+x-y)
= (x+y)(x-y)(2x)
hence the expanded form is 2x(x+y)(x-y)
Answer:
Correct answer is: E
Step-by-step explanation:
Answer:
first and last statement listed
Explanation:
because f(c) is showing time, the start of the reaction will be when the y axis = 0 (because 0 time will have passed)
we can see the value of x/c is 20 when y/f(c) is 0 (20, 0)
indicating that the concentration of the chemical is 20 milligrams/liter at the start of the reaction.
<u>{first statement correct}</u>
<em>[second statement incorrect]</em>
Because the x-value [c] is increasing with the y-value [f(c)], we know that the concentration of the chemical increases as the reaction progresses over time. (time increases, concentration increases)
<u>{last statement correct}</u>
<em>[third statement incorrect]</em>
note that "the concentration of the chemical does not fall below 20 milligrams/liter" does not say anything about when [meaning during the reaction, at the start of, or before are all being considered] the concentration is less than 20 milligrams/liter.
We can see, that <em>before</em> this reaction, the concentration of the chemical <em>does </em>fall below 20 milligrams/liter
<em>[fourth statement incorrect]</em>
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hope this helps!!
Hello :
the equation 3x^2+4x-7=0 has 2 solutions because : ac <span>< 0
a = 3 b=4 c= -7
</span>Δ = b²-4ac....... b² ≥ 0 and -4ac > 0 ..... (ac < 0 )
coclusion : Δ>0.....(2 solutions)
