56x64=3584

ủng hộ nhé~~

56x64

=(60-4)x(60+4)

=3600-16

=3584

\(56.64=\left(60-4\right).\left(60+4\right)=60^2-4^2=3600-16=3584\)

56x64=64x56 ^^

56.64=(60-4)(60+4)

          =60²-4²

         =3600-16=3584

Ta có:  56 . 64 = ( 60 - 4 ) ( 60 + 4 ) = 60 2 - 4 2 = 3600 - 16 = 3584

Ta có:  56 . 64 = ( 60 - 4 ) ( 60 + 4 ) = 60 2 - 4 2 = 3600 - 16 = 3584 .

a) Ta có: ( x - 2 )( x + 2 ) = ( x )² - 2² = x² - 4.

b) Ta có: 56.64 = ( 60 - 4 )( 60 + 4 ) = 60² - 4² = 3600 - 16 = 3584.

a/(x+1)(x-1)=x² - 1²

b/(x-2y) (x+2y) =x²-(2y)²=x² - 4y

c/ 56.64=(60-4).(60+4)

=60² - 4²=3600-16=3584

*Áp dụng hằng đẳng thức nha bn!

Câu a : \(\left(x+1\right)\left(x-1\right)=x^2-1^2\)

Câu b : \(\left(x-2y\right)\left(x+2y\right)=x^2-4y^2\)

Câu c : \(56.64=\left(60-4\right)\left(60+4\right)=60^2-4^2=3600-16=3584\)

\(56.64=\left(60-4\right)\left(60+4\right)=60^2-4^2=3600-16=3584\)