a. 34^2 + 66^2 + 68 x 66

= 34 x 34 + 66 x 66 + 68 x 66

= 34 x 34 + 66 x (66 + 68)

= 34 x 34 + 66 x 134

= 34 x 34 + 66 x 34 + 66 x 100

= 34 x (34 + 66) + 66 x 100

= 34 x 100 + 66 x 100

= (34 + 66) x 100

= 100 x 100

= 10000

\(34^2+66^2+68.66\)

\(=34.34+66.66+68.66\)

\(=34.34+66.\left(68+66\right)\)

\(=34.34+66.134\)

\(=34.34+66.\left(100+34\right)\)

\(=34.34+66.100+66.34\)

\(=34.\left(66+34\right)+66.100\)

\(=34.100+66.100\)

\(=\left(34+66\right).100\)

\(=100^2\)

\(=10000\)

( 34^2+66^2+68.66

= 34^2 + 66^2 + 2. 34.66

= ( 34+66)^2

= 100^2 = 10 000

b) 74^2 + 24^2 - 48.74

= 74^2 + 24^2 - 2. 74 . 24

= (74-24)^2 = 50^2 = 2500 

a) 34^2 + 66^2 + 68 . 66 = 5580,66

b) 74^2 + 24^2 – 48 . 74 = 6003.26 

a, = 34^2 + 66^2 + 2.34.66

    = (34+66)^2 = 100^2 = 10000

b, = 74^2+24^2-2.24.74

   = (74-24)^2 = 500^2 = 250000

Tk mk nha

a)34^2+66^2+68.66 
=34^3+2.34.66+66^2 
=(34+66)^2 
=100^2=10000 

b)74^2+24^2-48.74 
=74^2-2.74.24+24^2 
=(74-24)^2 
=50^2=2500

a) \(34^2+66^2+68.66=34^2+2.34.66+66^2=\left(34+66\right)^2=10000\)

A. (34+66)²=100²=10000

B. (74-24)²=50²=2500

a/ 34^2 + 66^2 + 68 . 66

=34²+2.34.66+66²

=(34+66)²

=100²

=10000

b/ 74^2 + 24^2 - 48 . 74

=74²-2.74.24+24²

=(74-24)²

=50²

=2500

\(a,34^2+66^2+68.66\)

\(=34^2+2.34.66+66^2\)

\(=\left(34+66\right)^2\)

\(=100^2\)

\(=10000\)

\(b,74^2+24^2-48.74\)

\(=74^2-2.74.24+24^2\)

\(=\left(74-24\right)^2\)

\(=50^2\)

\(=2500\)

a) 34^2 + 66^2 + 68.66=34²+2.34.66+66²=(34+66)²=100²=10000

b) 74^2 + 24² - 48.74(câu b 24² mới đúng nhé)

=74²-2.24.74+24²

=(74-24)²=50²=2500

a) 34² + 66² + 68.66 = (34 + 66)² = 100² = 10000

b) phải là 24² mới đúng

74² + 24² - 48.74 = (74 - 24)² = 50² = 2500

34.66 - 34.4 - 66.34 - 66.4

= ( 34.66 - 66.34) - ( 34.4 +66.4)

= 0 - 4.(34+66)

= -4.100 

= -400

\(34.\left(66-4\right)-66.\left(34+4\right)\\ =34.66-34.4-66.34-66.4\\ =\left(34-34-4\right).66-34.4\\ =-4.66-34.4\\ =4.\left(-66\right)-34.4\\ =4.\left(-66-34\right)\\ =4.\left(-100\right)\\=-400\\ -264.\left(-400\right).264.40\\ =264.400.264.40\\ =264.4.100.264.4.10\\ =264.4.264.4.\left(100.10\right)\\ =\left(264.4\right)^2.1000\\ =1115136.1000=1115136000\)