गुना कीजिए :
`(i) (a+7)` और `(b-5)` को
`(ii) (a^2+2b^2)` और`(5a-3b)` को

Multiply (i) (a+7) and (b-5) (ii) (a^2+2b^2) and (5a-3b)

Multiply (i) (a+7) and (b-5) (ii) (a^(2)+2b^(2)) and (5a-3b)

Expand : (i) (4a-5b)^(3) " " (ii) (a+2b)^(3)

Expand : (i) (4a-5b)^(3) " " (ii) (a+2b)^(3)

If a = 2 and b = 3, find the value of (i) a + b (ii) a^(2) + ab (iii) ab - a^(2) (iv) 2a - 3b (v) 5a^(2) - 2ab (vi) a^(3) - b^(3)

Find the product : (i) (x+3)(x^(2)-3x+9) " " (ii) (7+5b)(49-35b+25b^(2)) (iii) (5a+(1)/(2)) (25a^(2)-(5a)/(2)+(1)/(4)) " " (iv) (a+b-2)[a^(2)+b^(2)+4(a+b)+4] .

Divide : (i) 1\ b y1/2 (ii) 5\ b y(-5)/7 (iii) (-3)/4b y9/(-16)

Find the value of a and b . (sqrt11 - sqrt7 ) / (sqrt 11 + sqrt 7) = a - b sqrt 77 (i) a = 9/2 , b = 1/2 (ii) a = 2/9, b = 2/3 (iii) a = 2/5, b = 1/2 (iv) a = 9/2, b =5/2

Simplify the following (i) (3a^4b^3)(18 a^3b^5) (ii) (3a^7b^6)/(18 a^6b^8) ((-2a^2)/(b^3))^3