Question

pls solve this step by step pls give me an answer really quick​

Answer 1

Answer:

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Answer 2

Answer :

( a )

$\sf \: using \: identity : {(a - b)}^{2} = {a}^{2} - 2ab + {b}^{2}$

$\sf{(4p - 3q)}^{2}$

$\sf= {(4p)}^{2} - 2(4p)(3q) + {(3q)}^{2} \\ \sf = {16p}^{2} - 24pq + {9q}^{2}$

( b )

$\sf \: using \: identity:(x + a)(x + b) = {x}^{2} + (a + b)x + ab$

$\sf \: 105 \times 109$

$\sf = (100 + 5)(100 + 9) \\ \sf = {(100)}^{2} + (5 + 9)(100) + (5 \times 9) \\ \sf = 10000 + 1400 + 45 \\ \sf = 11445..$