Question

please solve sum 23, I mark him as brianliest

Answer 1

23)I
given
${a}^{2} + {b}^{2} = 225$
and ab=100
we know that
$( {a + b)}^{2} = {a}^{2} + {b}^{2} + 2ab$
=225+(2*100)
=225+200
=425
${(a + b)}^{2} = 425$
$a + b = \sqrt{425}$
ii)
we know that
${(a - b)}^{2} = {a}^{2} + {b}^{2} - 2ab$
=225-(2*100)
=225-200
=25
${a - b}^{2} = 25$
$a - b = \sqrt{25}$
a-b=5
hope it is helpful to you pls mark as brainliest