Y^2 - 9w^2
= y^2 - 3^2w^2
=(y + 3w)(y - 3w)
X^2 - 14 x = 15
(x - 7)^2 - 49 = 15
(x-7)^2 = 64
x - 7 = - or + 8
x = 15 or -1
Just take half o the coefficient of x and subtract it squared as above.
In general
x^2 + ax = b
(x + a/2)^2 - a^2/4 = b
Answer: 87.5
Step-by-step explanation:
The Area formula for a Trapezium is
depicted in the two picture below.
As seen in the picture Area equals
A+B(h) all divided by 1/2 or simplistic terms 2.
A+b
A= ---------- (h)
2
So we need to plug our information in
as Depicted in the picture measurement A is first top side
And B is bottom base
so h IS the height of the figure. Its the middle line in the middle of the figure.
10+15
A= ________(7)
2
10+15=25
25*7=175
175/2=87.5
So your answer is
Area of ABCD is 87.5
Sent a picture of the solution to the problem (s).
25/4 is the right answer have a good day :)