Advertisements
Advertisements
प्रश्न
factorise: a2 - 23a + 42
योग
Advertisements
उत्तर
a2 - 23a + 42 ...[42 = 21 × 2 and 21 + 2 = 23]
= a2 - 21a - 2a + 42
= a(a - 21) - 2(a - 21)
= (a - 21)(a - 2)
shaalaa.com
Factorisation by Grouping
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
Factorise by the grouping method : (ax + by)2 + (bx - ay)2
Factorise using the grouping method :
a2 + 4b2 - 3a + 6b - 4ab
Factorise:
2a − 4b − xa + 2bx
Factorise : 6a2 - 3a2b - bc2 + 2c2
factorise: x2 + 5xy + 4y2
factorise: a2 − 3a − 40
factorise: 2a2 - 17ab + 26b2
factorise: ax2 + b2y - ab2 - x2y
Factorise the following by grouping the terms:
8(2a + b)2 - 8a -4b
Factorise the following by grouping the terms:
9x3 + 6x2y2 - 4y3 - 6xy
