1.运用完全平方公式计算(1)(a-2b)²;(2)(3x+2y)²;(3)(4a-3b)²(4)(-2-x)²;(5)(1.5+2x)²;(6)(3/2乘a- 2/3乘b)²(7)0.98²;(8)895²;(9)109²;(10)
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![1.运用完全平方公式计算(1)(a-2b)²;(2)(3x+2y)²;(3)(4a-3b)²(4)(-2-x)²;(5)(1.5+2x)²;(6)(3/2乘a- 2/3乘b)²(7)0.98²;(8)895²;(9)109²;(10)](/uploads/image/z/976287-39-7.jpg?t=1.%E8%BF%90%E7%94%A8%E5%AE%8C%E5%85%A8%E5%B9%B3%E6%96%B9%E5%85%AC%E5%BC%8F%E8%AE%A1%E7%AE%97%EF%BC%881%EF%BC%89%28a-2b%EF%BC%89%26%23178%3B%EF%BC%9B%EF%BC%882%EF%BC%89%283x%2B2y%29%26%23178%3B%EF%BC%9B%EF%BC%883%EF%BC%89%284a-3b%29%26%23178%3B%EF%BC%884%EF%BC%89%28-2-x%EF%BC%89%26%23178%3B%EF%BC%9B%EF%BC%885%EF%BC%89%281.5%2B2x%EF%BC%89%26%23178%3B%EF%BC%9B%EF%BC%886%EF%BC%89%EF%BC%883%2F2%E4%B9%98a-+2%2F3%E4%B9%98b%EF%BC%89%26%23178%3B%EF%BC%887%EF%BC%890.98%26%23178%3B%EF%BC%9B%EF%BC%888%EF%BC%89895%26%23178%3B%EF%BC%9B%EF%BC%889%EF%BC%89109%26%23178%3B%EF%BC%9B%EF%BC%8810%EF%BC%89)
1.运用完全平方公式计算(1)(a-2b)²;(2)(3x+2y)²;(3)(4a-3b)²(4)(-2-x)²;(5)(1.5+2x)²;(6)(3/2乘a- 2/3乘b)²(7)0.98²;(8)895²;(9)109²;(10)
1.运用完全平方公式计算(1)(a-2b)²;(2)(3x+2y)²;(3)(4a-3b)²
(4)(-2-x)²;(5)(1.5+2x)²;(6)(3/2乘a- 2/3乘b)²(7)0.98²;(8)895²;(9)109²;(10)14.5²
2.填空:(1)107²=( + )²=( )²+2( )( )+( )²=( )
(2)93²=( - )²=( )²-2( )( )+( )²=( )
(3)(x+2)(x-2)=( )²-( )²?
求完整解题过程(填空直接答!)答题完整奖励:1信任度.
1.运用完全平方公式计算(1)(a-2b)²;(2)(3x+2y)²;(3)(4a-3b)²(4)(-2-x)²;(5)(1.5+2x)²;(6)(3/2乘a- 2/3乘b)²(7)0.98²;(8)895²;(9)109²;(10)
(4) = (2+x)^2=4+4x+x^2
(5) =2.25+6x+4x^2
(6) =9/4a^2-2ab+4/9b^2
(7) =(1-0.02)^2=1-0.04+(0.02)^2=1-0.04+0.0004=0.9604
(8) =(900-5)^2=810000-9000+25=801025
(9) =(100+9)^2=10000+1800+81=11881
2 .填空
(1)(100+7) (100) (100)(7) (11449)
(2)(100-7) (100) (100)(7) (8649)
(3) (x^2) (4)