Question

$a ^{2} - 1 = 4.29$
$a ^{2} - 1 = 4.29$
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Answer 1

$a^2-1=4,29\ \ ,\ \ \ a^2=5,29\ \ \ ,\ \ a=\pm \sqrt{5,29}\ \ ,\ \ a=\pm 2,3\\\\\\2y^2=50\ \ \ ,\ \ \ y^2=25\ \ \ ,\ \ \ y=\pm \sqrt{25}\ \ ,\ \ y=\pm 5\\\\\\b^2-3=1,84\ \ \ ,\ \ \ b=4,84\ \ ,\ \ \ b=\pm \sqrt{4,84}\ \ ,\ \ b=\pm 2,2$