Question

$( 2a - {5b}^{2} )$


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Answer 1

Answer:

$2a-5b^{2}$

Answer 2

${(2a - 5b)}^{2} \\ \\ {(x - y)}^{2} = {x}^{2} - 2xy + {y}^{2} \\ \\ (2 {a - 5b)}^{2} = {(2a)}^{2} - 2 \times 2a \times 5b + {(5b)}^{2} \\ \\ = 4 {a}^{2} - 20ab + 25 {b}^{2}$