Question

4_indique a expressão correta:

a) ${(a - b)}^{2} igual \: {a}^{2} - 2ab { + b}^{2}$

b) ${(2x - 3y)}^{2} igual \: {4x}^{2} - 12xy { + 9y}^{2}$

c) ${(a - b)}^{2} igual \: {a}^{2} + 2ab { - b}^{2}$

d) ${(2x - 3y)}^{2} igual \: {4x}^{2} - 12xy { - 9y}^{2}$
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Answer 1

a)

${(a - b)}^{2} igual \: {a}^{2} - 2ab { + b}^{2}$