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- 1. (x+a) 舒亶, (x+b) 唏亞唏仆亶 亞 唏仆唏亞亳亶仆 舒仍弍舒亶亞 仂 舒亞舒舒 仂仍. 亅勳亅亅丐 x a 丕亞 唏亞唏仆唏唏 勵亢勵勵仍亢 舒仍弍舒亶亞 仂仍. x x2 ax 丱丕丐 哦亞唏仆 亞 唏亞唏亞 仆 b 亟唏于唏仆 亞 唏仆唏亞唏亟 bx ab 于舒舒亞亟舒亢 弍亶 仍 舒仍弍舒亶 仆 亟亞亳亶仆 舒仍弍舒亶仆 仆亳亶仍弍亶 仆勵勵 弍舒亶仆舒.
- 3. (x+a)2 仆亳亶仍弍亳亶仆 从于舒亟舒亞 x2+2ax+a2 亞于舒仆 亞亳勵勵仆 弍仂仍亞仂仆 亰舒亟舒仍亟舒亞 仂仄仂 弍ﾑ 仆亳亶仍弍亳亶仆 从于舒亟舒仆 仂仄仂 亞亢 仆仍仆.
- 4. 勳亅亅 丱亅亅 丱仂 亳仍亳亶仍仍亳亶仆 仆亳亶仍弍亳亶仆 从于舒亟舒 仆 仆亞亟勵亞 亳仍亳亶仍仍亳亶仆 从于舒亟舒 亟 仆亞 , 仂亟亞舒舒 亳仍亳亶仍仍亳亶仆 勵亢于亳亶亞 仂 亟舒亳仆 仆仄亟, 亟 仆 仂亟亞舒舒 亳仍亳亶仍仍亳亶仆 从于舒亟舒亞 仆仄仆亶 仆勵勵.
- 5. (x+5)2=x2+2揃5揃x+52=x2+10x+25 (2y+1)2=(2y)2+2揃2y揃1+12=4y2+4y+1 (3c+5d)2=(3c)2+2揃3c揃5d+(5d)2 =9c2+30cd+25d2
- 6. 1. a+b 舒仍舒亶 从于舒亟舒仆 舒仍弍舒亶亞 仂仍 a b a b
- 7. (x+10)2= (6+5x)2= (0,5+4y) 2= (xy+10c) 2= (3m+1) 2 =
- 8. ( +a)2=1+2a+ = 2 (7+ )2= +28c+4c2 = (b+ )2= +6bn+9n2 = (4a+ ) 2= +8a+1 = ( +3c)2=4a2+ + =
- 9. a b a a2 ab b bx b2
- 10. 1. (x+10)2=x2+20x+100 2. (6+5x)2=36+60x+25x2 3. (0,5+4y)2=0,25+4y+16y2 4. (xy+10c)2=(xy)2+20xyc+100c2 5. (3m+x)2=9m2+6mx+x2 6. ( 1+a)2=1+2a+a2 7. (7+ 2c )2=49+28c+4c2 8. (b+3n)2= b2+6bn+9n2 9. (4a+1)2=16a2+8a+1 10. (2a+3c)2=4a2+12ac+9c2