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05.05.2020 •
Mathematics
Complete the equivalent equation for -7x-60 =x^2 +10x
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Ответ:
(x+12)(x+5)
Step-by-step explanation:
Formula use: a²+bx+c
Make one side equal to zero:Original:
-7x-60 =x² +10x
New:
x² + 17x + 60
Multiply A with CNew:
(1)x x 60 = 60
Find factors of 60 that when added, equal to 17.New:
10 × 6, 60 × 1, 20 × 3, 5 × 12, 4 × 15
5 times 12 equal 60, but when added equal to 17.
Replace the 17 with 5 and 12New:
x² + 5x + 12x + 60
Break them off into two equationsNew:
x² + 5x l 12x + 60
Divide each equation into it's simpilest form. Make sure the numbers in the ( ) are the same.New:
x(x + 5) l +12(x+5)
(x+12)(x+5)Ответ:
6.58-8.36x=3.98x-27.33
Collecting like terms
6.58+27.33=3.98x+8.36x
33.91=12.34x
33.91/12.34=12.34/12.34
x=2.75