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ELEN [110]
3 years ago
10

-4x -7 - 3x + 4 = 25

Mathematics
2 answers:
zimovet [89]3 years ago
7 0

Answer:

x=-4

Step-by-step explanation:

-4x -7 - 3x + 4 = 25

-7x=25-4+7

x=-28/7

x=-4

klasskru [66]3 years ago
7 0

-4x -7 - 3x + 4 = 25

-4x-3x-7+4= 25 rearranging

-7x-3= 25

Move -3 to the other side. Sign changes from -3 to +3.

-7x-3+3=25+3

-7x= 28

divide by -7

-7x/-7= 28/-7

x= -4

Answer: x= -4

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I will use a quadratic formula:

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Hey! So, here's a tip. When writing exponents, an easier way is to write a^b, rather than a to the b power. Besides that, here is your answer!


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Now that we have that figured out, we can add them together, wish is simple. 729 + 9 + 216 + 225= 1,179.



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Applying the factorization method, for example:

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               \bf{\\ &=(x+6)(x-6)(x+5)(x-5);    }

              \bf{ x_1=6 \quad x_2=-6 \quad \ \ \ x_3=5 \quad x_4=5  }

\bf{2) \  x^4-25x^2+144=0  }

Applying the factorization method:

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