# Solve The ff.quadratic equations by extracting square roots. 1.x^2=16 2.t^2=81 3.r^2-100=0 4.x^2-144=0 5.2s^2=50 6.4x^2-225=0 7.3h^2-147=0 8.(x-4)^2=169 9.(k+7)^2=289 10.(2s-1)^2=225

1
by blessieodoya

2015-06-10T20:00:52+08:00

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1. x² = 16 ; x=±√16=±4
2. t
²=81 ; t=±√81=±9
3. r
²-100=0 ; r²=100 ; r=±√100=±10
4. x
²-144=0 ; x²=144 ; x=±√144=±12
5. 2s
²=50 ; s²=25 ; s=±√25=±5
6. 4x
²-225=0; 4x²=225; x²=225/4 ; x=±√(225/4)=±15/2
7. 3h
²-147=0; 3h²=147; h²=147/3=49; h=±√49=±7
8. (x-4)
²=169; x-4=±√169=±13;
When x-4 = 13, x=17
"     x-4 = -13, x=-9
9. (k+7)
²=289; k+7=±√289=±17;
When k+7 = 17, k=10
"    k+7 = -17, k=-24
10. (2s-1)
²=225; 2s-1=±√225=±15
When 2s-1=15, s=8
"     2s-1=-15, s=-7
salamat po:D