Advertisements
Advertisements
प्रश्न
Factorise the following.
x2 + 9x + 20
योग
उत्तर
We have,
x2 + 9x + 20 = x2 + 5x + 4x + 5 × 4
= x(x + 5) + 4(x + 5)
= (x + 5)(x + 4)
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 7: Algebraic Expression, Identities and Factorisation - Exercise [पृष्ठ २३५]
APPEARS IN
संबंधित प्रश्न
Use a suitable identity to get the following products.
(7a − 9b) (7a − 9b)
Simplify (m2 − n2m)2 + 2m3n2
Using identities, evaluate 992
Using identities, evaluate 9982
Using a2 − b2 = (a + b) (a − b), find 1532 − 1472
Use the formula to find the value.
97 × 103
Expand: `("y" - 3/"y")^2`
Factorise the following using suitable identity
y2 + 20y + 100
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
a2x2 + 2ax + 1
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
16x2 + 40x + 25
