3 years ago

X^2=12x-27 solve by factoring

Mathematics

1 answer:

Alex Ar [27]3 years ago

3 0

Answer:

X=3 or X=9

Step-by-step explanation:

Step 1: Subtract 12x-27 from both sides.

x2−(12x−27)=12x−27−(12x−27)

x2−12x+27=0

2: Factor left side of equation.

(x−3)(x−9)=0

Step 3: Set factors equal to 0.

x−3=0 or x−9=0

x=3 or x=9

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What is the value of X? What is the value of Y? What is the value of Z?

baherus [9]

Answer:

The answer is

$x = 12 \\ y = 20 \\ z = 15$

Step-by-step explanation:

By using Pythagoras low

Then we can find that

${y}^{2} = {x}^{2} + {16}^{2} \\ {z}^{2} = {x}^{2} + {9}^{2} \\ {y}^{2} + {z}^{2} = {25}^{2} \\ then \\ {x}^{2} + {9}^{2} + {x}^{2} + {16}^{2} = {25}^{2} \\ 2 {x}^{2} = 288 \\ x = 12 \\ By \: substituting \: x \: into \: the \: previous \: equations \\ then \: \\ y = 20 \\ z = 15$