Can someone help please

a=4

Step-by-step explanation:

Hi there!

We are looking for the value of . We know that and .

We'll start with the Pythagorean theorem:

Now, we'll subtract from both sides so that is by itself.

We can now substitute our known values of and into the equation. Make sure to put the substituted values in parenthesis.

Let's apply the exponents to the values we substituted in:

Now, to eliminate the exponent on , we take the square root of both sides:

Let me know if you have any questions!

(x3 + 6x2 + 2x - 6) • (x - 1)

step-by-step explanation:

polynomial long division :

3.2     polynomial long division

dividing :   x4+5x3-4x2-8x+6

                              ("dividend")

by         :     x-1     ("divisor")

dividend     x4   +   5x3   -   4x2   -   8x   +   6

- divisor   * x3     x4   -   x3            

remainder         6x3   -   4x2   -   8x   +   6

- divisor   * 6x2         6x3   -   6x2        

remainder             2x2   -   8x   +   6

- divisor   * 2x1             2x2   -   2x    

remainder               -   6x   +   6

- divisor   * -6x0               -   6x   +   6

remainder                     0

quotient :   x3+6x2+2x-6   remainder:   0

what is the original number? you forgot to add it.