помогите срочно пжжжжжж помочь. Created by mmaxprophet. algebra-ru

помогите срочно пжжжжжж помочь...

mmaxprophet @mmaxprophet

November 2021 1 17 Report

помогите срочно пжжжжжж помочь

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гюйс

Verified answer

X²+x-56=0
D=1+4*56=225=+-15²
x1=(1-15)/2= - 7
x2=(1+15)/2=8

4x²+12x+9=0
D/4=6² - 4*9=36-36=0
x1=x2= - 6/4= - 1.5

3x²-7x-40=0
D=49+4*3*40=529=+-23²
x1=(7-23)/6= - 2 2/3
x2=(7+23)/6=5

x² - 4√3 x+12=0
D=16*3 - 4*12=48-48=0
x1=x2=4√3 /2=2√3

4.
15x²+16x-15=0
D/4=8² + 15*15= 289=+-17²
x1=(-8-17)/15= - 5/3= - 1 2/3
x2=(-8+17)/15=3/5

15x² - 2x - 8=0
D/4=1+15*8=121=+-11²
x1=(2-11)/15= - 3/5
x2=(2+11)/15=13/15

x²+5x+9/4=0
4x²+20x+9=0
D/4=10² - 4*9=64=+-8²
x1=(-10-8)/4= - 4.5
x2=(-10+8)/4= - 0.5

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