Question

Can anybody answer all..
Please it's urgent

Answer 1

1.(1/2)^2 +(1/root2)^2

=1/4 +1/2

=(1+2)/4

=3/4

2.ar pqr/ar. xyz = (qr/yz)^2

75/ar. xyz = 25/49

25ar xyz =75 ×49

ar xyz =( 75×49)/25

3.2×^2+px+8=0

a= 2

b= p

c= 8

for equal and real roots

b2-4ac=0

p^2-64=0

p^2=64

p= 8

4. a) a(7,13) b(10,9)

$\sqrt{(10 - 7) {}^{2} + ( - 10 - 2) {}^{2} } \\ = \sqrt{(9 + 144} \\ \\ \sqrt{153 } \\ = 12.3$