1) 9⁴ х 9⁻³ = 9⁴⁻³ = 9¹ = 9
2) 5⁻⁴ х 5³ = 5⁻⁴⁺³ = 5⁻¹ = 1/5 = 0,2
3) (1/2)⁻⁸ х (1/2)⁷ = (1/2)⁻¹ = 2
4) (1/3) х (1/3)¹° = (1/3)¹¹
5) 2⁴ : 2⁵ = 2⁻¹ = 1/2 = 0,5
6) 5 : 5⁻³ = 5¹⁻(⁻³) = 5¹⁺³ = 5⁴
0.025 *3.6+1.01=0.09+1.01=1.1
8x^2+5x-4=0
D= 25-4*8*(-4)
D=153= 3Y17
x1,x2= (-5<u>+</u>3Y17)/16
22.
1) √7 + √12=2,646+3,464=6,11
2) √3 - √1=1,732-1=0,732
3) √11 + √9=3,317+3=6,317
4) √37 - √5=6,083-2,236=3,847
5) √2 + √17=1,414+4,123=5,537
6) √32 - √21=5,657 - 4,583=1,074