Advertisements
Advertisements
प्रश्न
Factorise the following expressions
x2 + 14x + 49
Advertisements
उत्तर
x2 + 14x + 49 = x2 + 14x + 72
Comparing with a2 + 2ab + b2 = (a + b)2 we have a = x and b = 7
⇒ x2 + 2(x)(7) + 72 = (x + 7)2
∴ x2 + 14x + 49 = (x + 7)2
APPEARS IN
संबंधित प्रश्न
Simplify (ab + bc)2 − 2ab2c
Using identities, evaluate (5.2)2
Using identities, evaluate 297 × 303
Using a2 − b2 = (a + b) (a − b), find (1.02)2 − (0.98)2
Use the formula to multiply the following.
`(x/5+6)(x/5-6)`
Expand: (2x + 3y)2
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
x2 + 2x + 1
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
4x2 + 4x + 1
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
4x2 + 12x + 9
Find the length of the side of the given square if area of the square is 625 square units and then find the value of x.
