Question

Sederhanakan aljabar berikut :

1. 2x + 3y - 4x - 5y
2. 7a(1 + b) - 3b(1 + a)
3. 3 3
______ + ______
x + 1 x - 1

Beserta caranya...!

Answer 1

1. 2x + 3y - 4x - 5y= (2x-4y) + (3y-5y)= -2x -2y
2. 7a(1 + b) - 3b(1 + a)
= 7a + 7ab - 3b - 3ab
= 7a +4ab -3b
3. 3 3
______ + ______
x + 1 x - 1
= 3(x-1) + 3( x+1)
= 3x-3 + 3x +3
= 6x

Answer 2

1.2x-4x+3y-5y
⇔-2x-2y
⇔2(x-y)
2.7a+7ab-3b+3ab
⇔7a-3b+7ab+3ab
⇔7a+10ab-3b
3. 3(x-1)+3(x+1)
   --------------------
   ( x+1)(x-1)
⇔3x-3+3x+3
     ________
       x²-1
⇔6x per x²-1
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