Question

What is the value of asquare + B square if a-b is 9 and ab is 10

Answer 1

Step-by-step explanation:

Moving from left to right across a period, electrons are added one at a time to the outer energy shell. Electrons within a shell cannot shield each other from the attraction to protons, while moving down a group in the periodic table, the number of electrons and filled electron shells increases.

Answer 2

Answer:

61

Step-by-step explanation:

We know that,

$( {a - b})^{2} = {a}^{2} - {b}^{2} + 2ab$

So taking 2ab to left side, we get

$( {a - b})^{2} - 2ab = {a}^{2} + {b}^{2}$

Now putting the value of a-b and 2ab,we get

${9}^{2} - 2 \times 10 = {a}^{2} + {b}^{2}$

$= 81 - 20$

=61

Thank you