98的平方乘4简便运算
问题描述:
98的平方乘4简便运算
答
98²-4
=98²-2²
=(98+2)x(98-2)
=100x96
=9600
98的平方乘4简便运算
98²-4
=98²-2²
=(98+2)x(98-2)
=100x96
=9600