Question

помогите 8кл алгебра 100баллов

Answer 1

1
$sqrt{(2,8)^2}= 2.8^{(2* frac{1}{2}) } =2.8^1=2.8 \ sqrt{(-1.3)^2}= (-1.3)^{(2* frac{1}{2}) } =(-1.3)^1=-1.3 \ sqrt{(-0.5)^2}= (-0.5)^{(2* frac{1}{2}) } =(-0.5)^1=-0.5 \ sqrt{(4.51)^2}= 4.51^{(2* frac{1}{2}) } =4.51^1=4.51$

2
$sqrt{6^4}= 6^{(4* frac{1}{2} )}= 6^{2}=36 \ sqrt{(-4) ^{8} }= (-4)^{(8* frac{1}{2}) }= (-4)^{4}=256 \sqrt{(-0.3) ^{6} }= (-0.3)^{(6* frac{1}{2} )}= (-0.3)^{3}=- 0.027\ sqrt{3^6*6^4}= sqrt{3^6}* sqrt{6^4}=3^3*6^2=27*36= 972$

3
$sqrt{b^2}=b$
$sqrt{0.36}y^2=0.6y^2$

4
$sqrt{32-10 sqrt{7} }= sqrt{2*16-2*5 sqrt{7} }= sqrt{2*(16-5 sqrt{7} )} = sqrt{2} sqrt{16-5 sqrt{7} }$