Use the integral multiplication formula to calculate the following questions: （1）992-1 （2）125×123-1242．

Use the integral multiplication formula to calculate the following questions: （1）992-1 （2）125×123-1242．

(1) The original formula = (100-1) 2-1,
=1002-200+1-1，
=9800．
(2) The original formula = (124 + 1) (124-1) - 1242,
=1242-1-1242，
=-1．

Calculate the square of 1005 with multiplication formula

1005x1005
=(1000+5)^2
=1000^2+2x1000x5+5^2
=1000000+10000+25
=1010025

Using the multiplication formula to calculate the square of (a-b + C)

(a-b+c)(a-b+c)=a^2-ab+ac-ab+b^2-bc+ac-bc+c^2=a^2+b^2+c^2+2(ac-ab-bc)

(1 + 2) times (1 + 2's Square) times (1 + 2's 4th power) (1 + 2's 8th power) + 1, calculate with multiplication formula

(1-2) * (1 + 2) times (1 + 2 squared) times (1 + 2 to the 4th power) (1 + 2 to the 8th power)
=(1-2 squared) * (1 + 2 squared) times (1 + 2's 4th power) (1 + 2's 8th power)
=…… =(the 16th power of 1-2)
So the original formula = (the 16th power of 1-2) / (1-2) + the 16th power of 1 = 2

The second power of (3x-2 / 3Y) is calculated by multiplication formula

Complete square formula:
Original formula = 9x ^ 2-4xy + 4 / 9y ^ 2

The third power of 3x - the square of 2x - the square of a of X - (n + 1) a + n cross multiplication

The fourth power of 3x? - 2x? - x = - x? (x? - 3x + 2) = - x? (x-1) (X-2) a? - (n + 1) a + n = (a-N) (A-1) I'm very happy to answer the question for you. I wish you progress in your study! [the 1990] team will answer the questions for you. If you agree with my answer, please click below

If the quadratic - 3x + m of X is a complete square formula, then M =?

Original formula = x ^ 2-3x + 2.25-2.25 + M
=(x-1.5)^2+m-2.25
It's exactly because square is 0-2
So m = 2.25

Calculation: (3x to the 4th power - 3x square + 1) (x to the 4th power + x square - 2) =?

(3x^4-3x^2+1)(x^4+x^2-2)
=[3(x^4-x^2-2)+7](x^4+X^2-2)
=3(x^4-x^2-2)(x^4+X^2-2)+7(x^4+X^2-2)
=3(x^4-2)^2-x^4+7(x^4+X^2-2)
=3x^8-6x^4+7x^2-2

2x square-3x-20 factorized by cross multiplication

"Love you 01"
2x²-3x-20
＝（2x-5）（x+4）
First, divide 2x? Into 2x × X and 20 into 4 × 5
Because 20 is a negative sign, there must be a negative number between 5 and 4
Because 3x is a negative number, the larger number 5 is taken as a negative number
When you are skilled, you have to change at random
Good bye

3x square - 2x - 1 x square + 7x + 12 factorized by cross multiplication

3x square-2x-1 = (3x-1) (x + 1)
Xsquare + 7x + 12 = (x + 3) (x + 4)