doprowadz do prostej postaci a następnie oblicz wartośc wyrazenia [x-2]do kwadratu -[x-3 ] = dla x =-1 i jedna druga [x+3]+2[x+1]do kwadratu dla x=-1i jedna druga
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
(x-2)²-(x-3)=x²-2*x*(-2)²+(-2)²-x+3=x²-2x*4+4-x+3=x²-8x+4-x+3=x²-9x+7
dla x=-1¹/₂
x²-9x+7=(-¹/₂)²-9*(-1¹/₂)+7=(-³/₂)²-9*(-³/₂)+7=⁹/₄ - ²⁷/₂+7=⁹/₄ - ⁵⁴/₄+7=-⁴⁵/₄+7=-⁴⁵/₄+⁷/₁=-⁴⁵/₄+²⁸/₄=-⁷³/₄=-18¹/₄
(x+3)+2(x+1)²=x+3+2(x²+2*x*1+1²)=x+3+2(x²+2x+1)=x+3+2x²+4x+2=
5x+2x²+5=
dla x=-1¹/₂
5x+2x²+5=5*(-1¹/₂)+2*(-1¹/₂)²+5=5*(-³/₂)+2*(-³/₂)²+5=
-¹⁵/₂+2*⁹/₄+5=-¹⁵/₂+⁹/₂+5=-⁶/₂+⁵/₁=-⁶/₂+¹⁰/₂=⁴/₂=2