jazzyfa30
Solve the equation by factoring:
x2  81 = 0



This Question is Closed

hartnn
Best Response
You've already chosen the best response.
1
81 is the square of which number?

jazzyfa30
Best Response
You've already chosen the best response.
1
9

hartnn
Best Response
You've already chosen the best response.
1
right!
so, we have \(x^29^2 =0\)
now use \(a^2b^2=(a+b)(ab)\)
to factor that!, what u get ?

hartnn
Best Response
You've already chosen the best response.
1
a=x, b=9

jazzyfa30
Best Response
You've already chosen the best response.
1
9 or 9

Pradius
Best Response
You've already chosen the best response.
0
(x+9)(x9)

hartnn
Best Response
You've already chosen the best response.
1
correct! good :)

jazzyfa30
Best Response
You've already chosen the best response.
1
ok