Question

obten los productos notables
a) (× - 2y)² =
b) (3a + 7)² =
c) (6ײ -1)² =
d) (2ab + 5)² =
e) (3r²t - 2)² =
f) (4x³ + 2y)²=

ayuden por favor es para hoy doy coronita!

(si solo quieren puntos no comenten porfa)
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Answer 1

Respuesta:

A- =x2−4xy+4y2

B- =9a2+42a+49

C- =36x4−12x2+1

D- =4a2b2+20ab+25

E- =9r4t2−12r2t+4

F- =16x6+16x3y+4y2

Explicación paso a paso:

A- (x−2y)2

=(x+−2y)(x+−2y)

=(x)(x)+(x)(−2y)+(−2y)(x)+(−2y)(−2y)

=x2−2xy−2xy+4y2

=x2−4xy+4y2

B- (3a+7)2

=(3a+7)(3a+7)

=(3a)(3a)+(3a)(7)+(7)(3a)+(7)(7)

=9a2+21a+21a+49

=9a2+42a+49

C- 6x2−1)2

=(6x2+−1)(6x2+−1)

=(6x2)(6x2)+(6x2)(−1)+(−1)(6x2)+(−1)(−1)

=36x4−6x2−6x2+1

=36x4−12x2+1

D- (2ab+5)2

=(2ab+5)(2ab+5)

=(2ab)(2ab)+(2ab)(5)+(5)(2ab)+(5)(5)

=4a2b2+10ab+10ab+25

=4a2b2+20ab+25

E- (3r2t−2)2

=(3r2t+−2)(3r2t+−2)

=(3r2t)(3r2t)+(3r2t)(−2)+(−2)(3r2t)+(−2)(−2)

=9r4t2−6r2t−6r2t+4

=9r4t2−12r2t+4

F- (4x3+2y)2

=(4x3+2y)(4x3+2y)

=(4x3)(4x3)+(4x3)(2y)+(2y)(4x3)+(2y)(2y)

=16x6+8x3y+8x3y+4y2

=16x6+16x3y+4y2