Prove the following (17–31) : 16+c sta atb 17. (a) (2) gr rtp ptg ytz z+x xty =2 P x 9 y

Factorise the following : x^2 - 16x - 17

Factorise the following. (i) x^(2) +10x + 24 (ii) z^(2) +4z -12 (iii) p^(2) -6p -16 (iv) t^(2) +72 -17t (v) y^(2) -16y-80 (vi) a^(2) +10a -600

Prove the following: (cos9x -cos5x)/(sin17x-sin3x)=-(sin2x)/(cos10x)

Solve the following pair of linear equations by substitution method : 2x+y=17 , 17x-11y=8 .

Show that the following planes are at right angle: x-2y+4z=10\ a n d\ 18 x+17 y+4z=49.