Simplify. (5sqrt2-1)^2

Mathematics

2 answers:

lidiya [134]3 years ago

8 0

Answer:

(5√2-1)^2= (5x1)^2=25

Step-by-step explanation:

I believe 25 is the correct answer because you simplify the parentheses first, then we raise to the second power so 5 times sqrt 1 is 5. Then 5 x 5 is 25.

Comment below if this helps, Thanks!

Over [174]3 years ago

5 0

Answer:

(5√2-1)^2= (5x1)^2=25

Step-by-step explanation:

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An equation of a plane is found with a point and a normal vector. Normal vector is a perpendicular vector on the plane.

Given the points, determine the vectors:

P = (5,0,0); Q = (0,9,0); R = (0,0,4)

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vector QR = (0,9,0) - (0,0,4) = (0,9,-4)

Knowing that cross product of two vectors will be perpendicular to these vectors, you can use the cross product as normal vector:

n = PQ × QR = $\left[\begin{array}{ccc}i&j&k\\5&-9&0\\0&9&-4\end{array}\right]$ $\left[\begin{array}{ccc}i&j\\5&-9\\0&9\end{array}\right]$