1) ac2-ad+c3-cd-bc2+bd= = (ac2 – ad) + (c3 –
bc2) + (bd – cd) = a·(c2 – d) + c2·(c – b) + d·(b – c) = a·(c2 – d) +
c2·(c – b) – d·(c – b) = a·(c2 – d) + c2·(c – b) – d·(c – b) = a·(c2 –
d) + (c – b)·(c2 – d) = (c2 – d)·(a + c – b)
2) mx2+my2-nx2-ny2+n-m= x2 ( m - n ) + y2 ( m - n ) - ( m - n ) = ( m-n ) (x2 + y2 - 1 )
3) am2+cm2-an+an2-cn+cn2= m2 (a + c ) + n2 ( a + c ) - n ( a + c ) = ( a+ c) ( m2 + n2 - n)
4) xy2-ny2-mx+mn+m2x-m2n= y2 ( x - n ) + m2 ( x - n) - m ( x - n ) = ( x-n) ( y2 + m2 - m )
5) a2b+a+ab2+b+2ab+2=ab ( a + b + 2 ) + ( a+ b+ 2 ) = 2 ( a+ b + 2 )
6) x2-xy+x-xy2+y3-y2= x ( x – y + 1) – y 2 ( x – y + 1)=( x – y + 1)( x – y 2 ).
1) 12⁻³=1/12³=1/1728
2) 3⁻⁴=1/3⁴=1/81
3) (-2)⁻⁶=1/(-2)⁶=1/64
4) (-5)⁻³=-1/5³=-1/125
5) 100⁻¹=1/100=0,01
6) (-1/8)⁻¹=-8
7) (2/3)⁻³=(3/2)³=27/8=3 3/8
8) (-7/9)⁻²=(9/7)²=81/49=1 32/49
9) (1 2/3)⁻¹=(5/3)⁻¹=3/5=0,6
10) (-1 1/4)⁻³=(-5/4)⁻³=(-4/5)³=-64/125
11) (0,01)⁻³=(1/100)⁻³=100³=1 000 000
12) (1,6)⁻²=(1 3/5)⁻²=(8/5)⁻²=(5/8)²=25/64
1) 3⁻³ + 6⁻² = 1/27 + 1/36 = 4/108 + 3/108 = 7/108
2) (2/3)⁻¹ + (-1,7)⁰ - 2⁻³ = 3/2 + 1 - 1/8 = 12/8 + 1 - 1/8 = 11/8 + 8/8 = 19/8 = 2 3/8
3) (3/4)⁻² * 2⁻³ = 16/9 * 1/8 = 16/(9*8) = 2/9
4) 10⁻¹ + 5⁻² - 2⁻³ = 1/10 + 1/25 - 1/8 = 20/200 + 8/200 - 25/200 = 3/200 = 15/1000 = 0,015
