Question

What is $(x-21)^{2} =28$ in simplifed radical form (if necessary)?

Answer 1

Answer:

Step-by-step explanation:

x=21+2√7

or

x=21-2√7

Answer 2

Answer:

$x = 26.3 \: or \: x \: = 15.7$

Step-by-step explanation:

$(x - 21) ^{2} = 28$

$(x - 21)(x - 21) = 28$

${x}^{2} - 42x + 441 = 28$

${x }^{2} - 42x + 441 - 28 = 0$

${x}^{2} - 42x - 413 = 0$