1: 25(x^2−3)+11=17

2:If using the method of completing the square to solve the quadratic equation x^2-13x+14=0, which number would have to be added to "complete the square"?

3:If using the method of completing the square to solve the quadratic equation x^2-13x+14=0, which number would have to be added to "complete the square"?

4:x^2-6x=7

5:x^2+22=−12x

1.the answer is +9/5 or - 9/5.

4.answer is 7 and - 1

Step-by-step explanation:

1.open the brackets

25x^2-75+11-17=0

25x^2-81=0

25x^2=81

x^2=81/25

x=+9/5

x=-9/5

4.x^2-6x-7=0

Factorise it and you get

(x-7)(x+1)=0

Where x-7 is 0 or x+1 is 0

So x can be 7 and - 1

part 1 answer = 8

part 2 answer = 72

step-by-step explanation:

part 1 explanation = add all of the numbers, then divide by how many numbers you have. so, 200/25 = 8.

part 2 explanation = not gonna lie, this is hard to explain, so just google how to do it.

in the math equation 8 x 7 = 56, the 8 and the 7 are both factors of 56, since in this lesson we will use square tiles to figure out the factors of a whole find as many different arrays as you can, but follow one important rule: all the rows must have the i can make two rows of nine, so 2 and 9 are both factors of 18.

step-by-step explanation: