Pleaseee help asap!!

x = 16 or x = 26

Step-by-step explanation:

(x – 21)² = 25

Expand

(x – 21)(x – 21) = 25

x² – 21x – 21x + 441 = 25

x² – 21x – 21x + 441 – 25 = 0

x² – 42x + 416 = 0

We shall solve by Factorisation method as shown below:

x² – 42x + 416 = 0

Multiply the first term, x² and the last term, 416 together. The result is 416x².

Find two factors of 416x² such that the sum of the factors will result to the 2nd term, – 42x in the expression above.

The factors are – 26x and – 16x.

Now, replace the 2nd term, – 42x with – 26x and – 16x. This is illustrated below:

x² – 42x + 416 = 0

x² – 26x – 16x + 416 = 0

Factorise

x(x – 26) – 16(x – 26) = 0

(x – 16)(x – 26) = 0

x – 16 = 0 or x – 26 = 0

x = 16 or x = 26

Therefore, the solutions to the equation (x – 21)² = 25 are 16 and 26.

10

step-by-step explanation:

7+3=10

x=17

step-by-step explanation:

solve 3x-24=x+10

then that makes it 2x=34 because you subtract an x from both sides to get rid of the one on the right, and then you add 24 to both sides to get rid of the 24 on the left

divide by both sides by 2 to get your answer so that you can get your answer