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sqrt(x + 10) = x - 2
Squaring both sides: x + 10 = (x - 2)2 = x2 - 4x + 4
Simplifying: x2 - 5x - 6 = 0
or (x + 1)(x - 6) = 0
so that x = -1 or x = 6
The perpendicular distance from (2, 4) to the equation works out as the square root of 20 or 2 times the square root of 5
√(40)=k√(10) Isolate k by dividing both sides by √(10) √(40)/√(10)=k √(40/10)=k √(4)=k k=2
x2 + 20x +0 =30 [(20/2)2 =100] x2 + 20x + 100 =30 +100 √(x+10)2=√130 x+10=√130 x= −10+√130 √ means square root
10 x 10 = 100 so 10 is the square root of 100 :)
You can take out the perfect square 4: root(40) = root(4 x 10) = root(4) x root(10) = 2 root(10).