Question

Given: m2 + 6 = 10
Conjecture: m = 2 is the ONLY solution


a.
False; m = 4.

c.
False; m = 3.

b.
True.

d.
False; m = −2.

Answer 1

assuming that's m^2, then m=2 is _not_ the only solution.

m^2 + 6 = 10
        -  6     -6
m^2       = 4
m           = +/- 2