The expression of equality is called equality.
The equation has three properties:
Property 1: both sides of the equation are added with the same number or formula at the same time, and the two sides are still equal.
If a=b
Then there is a+c = b+C.
Property 2: Both sides of the equation are multiplied (or divided) by the same non-zero number or formula at the same time, and the two sides are still equal.
If a=b
Then there is a c = b c
Or a \c = b \c(a, b≠0 or a=b, c≠0).
Property 3: Both sides of the equation are multiplied (or squared) at the same time, and both sides are still equal.
If a=b
Then there is a c = b C
Or (radical c a) = (radical c b)
Look at the textbook again, hoping I can find the answer.