Solve using the Square Root Property 21=(7^2-t)/2

Math
21=72-t2
Rewrite the equation as 72-t2=21.
72-t2=21
Multiply both sides of the equation by 2.
72-t=21⋅(2)
Simplify 72-t.
Tap for more steps…
Remove parentheses.
72-t=21⋅(2)
Raise 7 to the power of 2.
49-t=21⋅(2)
49-t=21⋅(2)
Multiply 21 by 2.
49-t=42
Move all terms not containing t to the right side of the equation.
Tap for more steps…
Subtract 49 from both sides of the equation.
-t=42-49
Subtract 49 from 42.
-t=-7
-t=-7
Multiply each term in -t=-7 by -1
Tap for more steps…
Multiply each term in -t=-7 by -1.
(-t)⋅-1=(-7)⋅-1
Multiply (-t)⋅-1.
Tap for more steps…
Multiply -1 by -1.
1t=(-7)⋅-1
Multiply t by 1.
t=(-7)⋅-1
t=(-7)⋅-1
Multiply -7 by -1.
t=7
t=7
Solve using the Square Root Property 21=(7^2-t)/2

Download our
App from the store

Create a High Performed UI/UX Design from a Silicon Valley.

Scroll to top