Question

Jika a = -2
b = -1
c = 4
tentukan :

1) a2 - ( b - c ) =
2) 2 ( a + b - c ) =
3) 2a + ab - ac =
4) ( a+b ) ( a+c ) =

please jawab ya beserta cara penyelesaian nya soalnya besok mau dikumpul ...

Answer 1

Jika a = -2 ; b = -1 ; c = 4

1. a2 - ( b - c ) = 4 - ( -1-4) = 4 - (-5) = 9
2. 2 ( a + b - c ) = 2 ( -7 ) = -14
3. -4 + 2 + 8 = 6
4. (-3) (2) = -6

Answer 2

1)
4-(-1-4)
4-(-5)
4+5=9

2)2(a+b-c)
2(-2-1-4)
2(-7)=-14

3)2a+ab-ac
2(-2)+(-2)(-1)-(-2)(4)
-4+2+8=6

4)(a+b)(a+c)
(-2-1)(-2+4)
(-3)(2)=-6