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Write the following squares of binomials as trinomials
We know that, (a + b)2 = a2 + 2ab + b2 and (a – b)2 = a2 – 2ab + b2
(i) (x + 2)2
(ii) (8a + 3b)2
(iii) (2m + 1)2
Find the product of the following binomials
(i) (2x + y) (2x + y)
(ii) (a + 2b) (a – 2b)
(iii) (a2 + bc) – (a2 – bc)
(vi) (2a3 + b3) (2a3 – b3)
Using the formula for squaring a binomial, evaluate the following
(i) (102)2
(ii) (99)2
(iii) (1001)2
(iv) (999)2
(v) (703)2
Simplify the following using the formula: (a + b) (a – b) = a2 – b2
(i) (82)2 – (18)2
(ii) (467)2 – (33)2
(iii) (79)2 – (69)2
(iv) 197 × 203
(v) 113 × 87
(vi) 95 × 105
(vii) 1.8 × 2.2
(viii) 9.8 × 10.2
Simplify the following using identities
Find the value of x, if:
(i) 4x = (52)2 – (48)2
(ii) 14x = (47)2 – (33)2
(iii) 5x = (50)2 – (40)2
If x + y = 4 and xy = 2, find the value of x2 + y2
If x – y = 7 and xy = 9, find the value of x2 + y2
If 3x + 5y = 11 and xy = 2, find the value of 9x2 + 25y2
Find the values of the following expressions
If 2x + 3y = 14 and 2x – 3y = 2, find the value of xy
If x2 + y2 = 29 and xy = 2, Find the value of
(i) x + y
(ii) x – y
(iii) x4 + y4
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Chapter 6: Algebraic Expressions and Identities...