Question

calcule a operação: (7y-2x²)²

Answer 1

$( {7y - {2x}^{2} )}^{2}$

$(7y - {2x}^{2} ) \times (7y - {2x}^{2} )$

$7y \times 7y - 7y \times {2x}^{2} - {2x}^{2} \times 7y - {2x}^{2} \times ( - {2x}^{2} )$

${49y}^{2} - {14x}^{2} y - {14x}^{2} y + {4x}^{4}$

${49y}^{2} - {28x}^{2} y + {4x}^{4}$

Answer 2

$(7y - { {2x}^{2}) }^{2}$

$(7y - {2x}^{2} ) \times (7y - {2x}^{2} )$

$7y \times 7y - 7y \times {2x}^{2} - {2x}^{2} \times 7y - {2x}^{2} \times ( { - 2y}^{2} )$

${49y}^{2} - {14x}^{2} y - {14x}^{2} y + {4x}^{4}$

${49y}^{2} - {28x}^{2} y + {4x}^{4}$