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pentagon [3]
3 years ago
14

Solve each equation

Mathematics
1 answer:
aliya0001 [1]3 years ago
5 0

Step-by-step explanation:

1.

0 =  {x}^{2}  - 7x - 18 \\ 0 =  {x}^{2}  + 2x - 9x - 18 \\ 0 = x(x + 2) - 9(x + 2) \\ 0 = (x + 2)(x - 9) \\  \\  \\ (x + 2) = 0 \:  \:  \:  \: or \:  \:  \:  \: (x - 9) = 0 \\  \\if  \:  \:x + 2 = 0 \\x = 0 - 2 \\ x =  (- 2) \\  \\ if \:  \:x - 9 = 0 \\ x = 0 + 9 \\ x = 9 \\

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