1. 10+7x+x²=0 2.x²-4=0 3.x²-9=0 4.3x-x²=0 5.x²+10x=0

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1. 10+7x+x²=0
2.x²-4=0
3.x²-9=0
4.3x-x²=0
5.x²+10x=0

Jawaban:

1. x=(-2)

2. x=2 atau x=(-2)

3. x=3 atau x=(-3)

4. x=3

5. x=(-10)