Explicación paso a paso:
21. (3−5)^2
= (3−5)(3−5)
= 3(3−5)−5(3−5)
= 9^2−15−5(3−5)
= 92−15−15+25
= 9^2−30+25 Respuesta.
22. (9−32)^2
= (9−32)(9−32)
= 9(9−32)−32(9−32)
= 812−288−32(9−32)
= 812−288−288+1024
= 812−576+1024 Respuesta.
23.
24. (2−)^2
= (2−)(2−)
= 2(2−)+(2−)(−)
= 4^2−2+(2−)(−)
= 4^2−2−(2−)⋅
= 4^2−2−(2−)
= 4^2−2−(2−2)
= 4^2−2−2+2
= 4^2−4+2 Respuesta.
25. (4−5)^2
= (4−5)(4−5)
= 4(4−5)−5(4−5)
= 16^2−20−5(4−5)
= 16^2−20−20+25^2
= 162−40+252 Respuesta.
26. (3−4)^2
= (3−4)(3−4)
= 3(3−4)−4(3−4)
= 9^2−12−4(3−4)
= 9^2−12−12+16^2
= 9^2−24+16^2 Respuesta.
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Explicación paso a paso:
21. (3−5)^2
= (3−5)(3−5)
= 3(3−5)−5(3−5)
= 9^2−15−5(3−5)
= 92−15−15+25
= 9^2−30+25 Respuesta.
22. (9−32)^2
= (9−32)(9−32)
= 9(9−32)−32(9−32)
= 812−288−32(9−32)
= 812−288−288+1024
= 812−576+1024 Respuesta.
23.
24. (2−)^2
= (2−)(2−)
= 2(2−)+(2−)(−)
= 4^2−2+(2−)(−)
= 4^2−2−(2−)⋅
= 4^2−2−(2−)
= 4^2−2−(2−2)
= 4^2−2−2+2
= 4^2−4+2 Respuesta.
25. (4−5)^2
= (4−5)(4−5)
= 4(4−5)−5(4−5)
= 16^2−20−5(4−5)
= 16^2−20−20+25^2
= 162−40+252 Respuesta.
26. (3−4)^2
= (3−4)(3−4)
= 3(3−4)−4(3−4)
= 9^2−12−4(3−4)
= 9^2−12−12+16^2
= 9^2−24+16^2 Respuesta.
= 4^2−2−(2−^2)
= 42−2−2+2= 42−4+2 Respuesta.