Posted on by Լաուրա Սարգսյան

Հանրահաշիվ դասարանում և տանը։


26.10.2020թ


1/ 7A 2/6B-4B= 10B 3/2X +7X-5X= 4X 4/ =10Y 5/ =2B 6/ = 7 X4 7/=1X 8/=
  1. 7A
  2. 2B
  3. 4X
  4. 6y
  5. 2×2-3x

7) 2x+13y+2

8) 8ab+12a+4b

9) 2a-2b+8c

10) -5m+13+2n

11) = 5+13a+10ab-6b

12) 9x+11y+6-4z

  1. 4A
  2. 5X
  3. 1Y
  4. 21M
  5. 7A2
  6. 9b
  7. 7kn
  8. 12x
  9. 3x
  10. 7b
2a + 5b = 2*4 + 5*(-3) = 8 + (-15) = -7
4m — 3n + 10 = 4*(-5) — 3*(-8) + 10 = (-20) — (-24) + 10 = 14
5x + 2y — 3z + 7 = 5*6 + 2*(-17) — 3*(-3) + 7 = 30 + (-34) — (-9) + 7 = 12
2ab — 3bc — 4ac = 2*4(-2) — 3*(-2)*3 — 4*4*3 = (-16) — (-15) — 48 = 47
3x — 4y + xy — 46 = 3*(-2) — 4*(-6) + (-2)*(-6) — 46 = (-5) — (-24) + 12 — 46 = 63
2ab — 7 (a — 2b) = 2*6*2 — 7 (6 — 2*2) = 34
a (2b + 5c) — 4b(a — 3c) = (-3)*(2*5 + 5* (-4) — 4*5 * (-3) — 3*(-4) = 30 — 480 = -450