The solutions to the equation
are 3 and -5.
<h3>What is the solution to the equation?</h3>
To solve any equation is to find the solution of the given equation which satisfied the equation.
The given expression is ![\rm (x + 2)^{2} - 2(x + 2) - 15 = 0](https://tex.z-dn.net/?f=%5Crm%20%28x%20%2B%202%29%5E%7B2%7D%20-%202%28x%20%2B%202%29%20-%2015%20%3D%200)
let u = (x +2)
then the equation becomes
![\rm u^{2} - 2u - 15 = 0](https://tex.z-dn.net/?f=%5Crm%20u%5E%7B2%7D%20-%202u%20-%2015%20%3D%200)
by factorizing, we get
(u + 3)(u - 5) = 0
u + 3 = 0, u = -3
u - 5 = 0, u = 5
Since, u = x + 2
So, x + 2 = 5, x = 3
x + 2 = -3, x = -5
Therefore, the solutions to the equation are 3 and -5.
Learn more about the solution of the equation ;
brainly.com/question/545403
Answer:
5x - 4y. add the values of x. add the values of y.
Answer:
z = 7.5
Step-by-step explanation:
Given that z is directly proportional to x and inversely proportional to y then the equation relating them is
z =
← k is the constant of proportionality
To find k use the condition when x = 16, y = 5, z = 16, then
k =
=
= 5
z =
← equation of proportionality
When x = 21, y = 14, then
z =
= 7.5
6.6cm and 660mm are equal.
Thanks.
Only one, because the sum of the 2 shorter sides must be greater than the longest side. So 11+16>26 and the sums of the other sides together are less than the third side. So only ONE triangle can be made.