Question

10°- Utilizando o quadrado da diferenca responda
a) (5x-2y)
b) (3m-n)
c)(4y - 1)
d)(m-y
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Answer 1

a)

$(5x - 2y {)}^{2} = ({5x})^{2} - 2 •5x•2y + ( {2y})^{2}$

$25 {x}^{2} - 20xy + 4 {y}^{2}$

b)

$(3 {m})^{2} - 2•3m•n + {n}^{2}$

$9 {m}^{2} - 6mn + {n}^{2}$

c)

$(4 {y})^{2} - 2•4y•1 + {1}^{2}$

$16 {y}^{2} - 8y + 1$

d)

${m}^{2} - 2•m•y + {y}^{2}$

${m}^{2} - 2my + {y}^{2}$