作业帮若a^2+2a=,则2a^2+4a+1=_____.【当m=1时,-2m^2-[-4m^2+(-m^2)]的值为_____.】
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若a^2+2a=,则2a^2+4a+1=_____.【当m=1时,-2m^2-[-4m^2+(-m^2)]的值为_____.】
若a^2+2a=,则2a^2+4a+1=_____.【当m=1时,-2m^2-[-4m^2+(-m^2)]的值为_____.】
若a^2+2a=,则2a^2+4a+1=_____.【当m=1时,-2m^2-[-4m^2+(-m^2)]的值为_____.】
若a^2+2a=X（假如）,
则2a^2+4a+1=2（a^2+2a）+1
=2X+1
当m=1时,-2m^2-[-4m^2+(-m^2)]
=-2-[-4+（-1）]
=3