maths

t squared +4t squared=16 squared

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t^2+4t^2=16^2

t^2(1+4)=16^2

t^2(5)=256

t^2=51.2

t=7.156(cor to 3 sig. fig.)

t squared +4t squared=16 squared
tt+4t(4t)=256
16(tt+tt)=256
16(tt+tt)/16=256/16
tt+tt=96
tt=48

t squared=48

t squared +4t squared=16 squared
5 t squared = 16 squared
t squared = 16 squared/5
t= -16/root 5 OR t= 16/root 5

3.2 squared