1.
-25,
3.
√144 + √25 = 12 + 5 = 17,
4.
при а = 1/3:
√(4 - 9а) = √(4 - 9*1/3) = √(4 - 3) = √1 = ±1,
5.
4√(6 1/4) - 3√(1 7/9) = 4√(25/4) - 3√(16/9) = 4*5/2 - 3*4/3 =
= 2*5 - 4 = 10 - 4 = 6,
6.
длина - а,
ширина в = 1/2 а,
S = а * в
18 = а * 1/2 а,
18 = 1/2 а²,
а² = 36,
а = 6 м - длина,
в = 1/2 * 6 = 3 м - ширина,
7.
√(5н-2м) = √(5*5-2*12) = √1 = 1,
√(м²+н²) = √(144+25) = √169 = 13,
√(н-м)² = √(5-12)² = √(-7)² = 7,
м√(н-5) = 12*√0 = 12*0 = 0,
-н√3м = -5*√36 = -5*6 = -30,
8.
95/√361 - 13/14√(1 27/169) + √(8²+15²) =
= 95/19 - 13/14√(196/169) + √(64+225) =
= 95/19 - 13/14*14/13 + √289 =
= 5 - 1 + 17 = 21,
3*4+2m=6
2m=-6
m=-3