Question

1) 2x³-3x=
X=3
2) X²Y+Y=
X=2
Y=1
3) √a+b
√a+√b
A=64
B=36
4) 2x+3a=
X=5
A=-4
5) X²-7x+y=
X=5
Y=-1
6) 7+A-B=
A=2
B=-2
7) 2x²-7y²=
X=-5
Y=-2

Answer 1

Resposta:

1) 2X³-3X=

2.3³- 3.3 =

2.27 - 9 =

54 - 9 = 45

2)X²Y+Y=

2².1 + 1 =

4.1 + 1 =

4 + 1 = 5

3) √a+b / √a + √b =

√64+36 / √64 + √36 =

√100 / 8 + 6 =

10/14 =

5/7

4) 2X + 3a =

2.5 + 3.(-4) =

10 + (-12) = -2

5) X² -7X + Y =

5² - 7.5 + (-1) =

25 - 35 - 1 = -11

6) 7 + A - B =

7 + 2 - (-2) =

7 + 2 + 2 = 11

7) 2X²-7Y²

2.(-5)² - 7.(-2)² =

2. 25 - 7.4=

50 - 28 = 22