4. Give the rule for forming the square of a multi nomial. (8) x1 — 8x3-26x2 + 168x+441. (9) 4x1—12x3+25x2−24x+16. (10) I+4x+10x2 + 12x3+9xa. (11) 9x1—1213y+34r2y2 —20xy3+25ya. (12) 10x1 — 10x3 — 12x3 + 5x2 +9xo −2x+1. (14) x6+10ax3+35a2x2+52a3x3 +35a2x2 + 10a3x +a6. (15) 9x3-12ax2 +4a2x® +6a3x3 — 4aaxa + a®x2. (22) 4a2+c2+(4a+3b) (3b−2c) + 4ac. (26) a+b+4a5b-1+2b ̄5a+2a1b ̄2 — 3b ̄1aa (30) 20449, 2*0449. (31) 19321, 19321, 19°321. (32) 62900761, 62900761, 6290076·1. 2. Find the cube root of (1) a3 +3a2b+3ab2+b3. (2) a3x3-12a3bx3 +48ab2x3-64b3x3. ས 2. Write in simpler forms (1) (√x)3. (2) ~/(ax)". (3) 5ax\ 5x I (2a + }) (26 + 1 ) = ( 2 √āb + vad)". 6. 7. Find the value of Vab |