Question

Me ayudan procedimientos y resultados ​

Answer 1

Primer ejercicio

1- (4x−5y)2

=(4x+−5y)(4x+−5y)

=(4x)(4x)+(4x)(−5y)+(−5y)(4x)+(−5y)(−5y)

=16x2−20xy−20xy+25y2

=16x2−40xy+25y2

2-(3x+2y)2

=(3x+2y)(3x+2y)

=(3x)(3x)+(3x)(2y)+(2y)(3x)+(2y)(2y)

=9x2+6xy+6xy+4y2

=9x2+12xy+4y2

3-(2x+3y)2

=(2x+3y)(2x+3y)

=(2x)(2x)+(2x)(3y)+(3y)(2x)+(3y)(3y)

=4x2+6xy+6xy+9y2

=4x2+12xy+9y2

4-(−12y+7z)2

=(−12y+7z)(−12y+7z)

=(−12y)(−12y)+(−12y)(7z)+(7z)(−12y)+(7z)(7z)

=144y2−84yz−84yz+49z2

=144y2−168yz+49z2