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23 votes
23 votes
Solve 5x² + 1 = 51 by finding square roots.

x = 50, -50
x = √10,-√10
x = 10, −10
x = √50,-√√/50

User Daniel Rose
by
2.6k points

1 Answer

6 votes
6 votes

Answer:

x = √10,-√10

explanation:

5x2 + 1 = 51

you would carry the +1 to the other side making it

5x2=51-1

which is 5x2=50

this equation above can then be turned into

x2=50÷5

which goes on to form the equation

x2=10

this can then be turned into x=the square root of ten

and since it is know that when an equation is x2 whether it is negative or positive it would result in the same answer

but yeah I'm not smart or whatever but I hope this helps

not too sure it's correct though

User Jyvet
by
2.5k points