2.16Chapter 2Essay Type Questions66. Find the product of (3a + 4b) and

1.	2.16Chapter 2Essay Type Questions66. Find the product of (3a + 4b) and (3a - 4b) andverify it when a = - 1 and b = 1.Dirfoll
Answer» (3a + 4b ) (3a - 4b ) = 3a ^2 - 4b^2 = 9a^2 - 16b ^2 ER. RAVI KUMAR ROY when a = -1 and b = 1LHS..(3-1 + 41)(3-1 - 41)= (1)(-7) = -7RHS..9(-1)^2 - 161 = 9 - 16 = -7LHS = RHS ( VERIFIED) same answer as above is right

2.16Chapter 2Essay Type Questions66. Find the product of (3a + 4b) and (3a - 4b) andverify it when a = - 1 and b = 1.Dirfoll

Answer»

(3a + 4b ) (3a - 4b ) = 3a ^2 - 4b^2 = 9a^2 - 16b ^2

ER. RAVI KUMAR ROY

when a = -1 and b = 1LHS..(3*-1 + 4*1)(3*-1 - 4*1)= (1)(-7) = -7RHS..9*(-1)^2 - 16*1 = 9 - 16 = -7LHS = RHS ( VERIFIED)

same answer as above is right