Advertisements
Advertisements
प्रश्न
Simplify (2.5p − 1.5q)2 − (1.5p − 2.5q)2
उत्तर
(2.5p − 1.5q)2 − (1.5p − 2.5q)2
= (2.5p)2 − 2(2.5p) (1.5q) + (1.5q)2 − [(1.5p)2 − 2(1.5p)(2.5q) + (2.5q)2]
[(a − b)2 = a2 − 2ab + b2 ]
= 6.25p2 − 7.5pq + 2.25q2 − [2.25p2 − 7.5pq + 6.25q2]
= 6.25p2 − 7.5pq + 2.25q2 − 2.25p2 + 7.5pq − 6.25q2]
= 4p2 − 4q2
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
Simplify (2x +5)2 − (2x − 5)2
Using identities, evaluate 297 × 303
Using (x + a) (x + b) = x2 + (a + b) x + ab, find 103 × 98
Use the formula to find the value.
54 × 46
Expand: `("y" - 3/"y")^2`
Use a formula to multiply of (2a – 13)(2a + 13)
Expand: (51)2
Evaluate the following, using suitable identity
512
Factorise the following.
p2 + 14p + 13
The area of a square is 9x2 + 24xy + 16y2. Find the side of the square.
