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jeka94
3 years ago
10

7(x−4)2−18=10 plsss help

Mathematics
2 answers:
Zigmanuir [339]3 years ago
8 0

Answer:

7(x - 4) {}^{2}  - 18 = 10 \\ 7 {x}^{2}  - 56x + 112 - 18 - 10 = 0 \\ 7x {}^{2}  - 56x + 84 = 0 \\ (x -  6)(x - 2) = 0 \\ x = 2 \: and \: 6

aleksandrvk [35]3 years ago
6 0

Answer:

7(x-4)2-18=12

x=6

Step-by-step explanation:

7(x-4)2-18=10

simplify:

14x-74=10

group all constants on the right side of the equation:

14z-74=10

14x-74+74=10+74

14x=10+74

14x=84

isolate the x:

14x=84

14x/14 = 84/14

x=84/14

x=6

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