A.3a–2a= 1 | B.a2·a3=a6 | C.(a–b)2=a2–2ab+b2 | D.(a+b)2=a2+b2 |
A.3a2+4a2=7a4 | B.3a2﹣4a2=﹣a2 |
C.3a•4a2=12a2 | D. |
A. | B. |
C. | D. |
A.m2﹣16=(m﹣4)(m+4) | B.m2+4m=m(m+4) |
C.m2﹣8m+16=(m﹣4)2 | D.m2+3m+9=(m+3)2 |
A.x2+1 | B.x2+2x-1 | C.x2+x+1 | D.x2+4x+4 |
© 2017-2019 超级试练试题库,All Rights Reserved.