Решить уравнения:
1) (x-12)(3x+9)=0
2)(x+2^2)=0
3)x^2+7x=0
4)x^2-25=0
1) (x-12)(3x+9)=0
2)(x+2^2)=0
3)x^2+7x=0
4)x^2-25=0
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Answers & Comments
2)(x+2^2)=0
x+4 = 0
x=-4
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3)x^2+7x=0
x²+7x = 0
x(x+7) = 0
x=0
x=-7
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4)x^2-25=0
x²=25
x = 5
x = -5