Advertisements
Advertisements
Question
Use a formula to multiply of (x − 5)(x + 5).
Sum
Advertisements
Solution
We use the formula:
(x − a)(x + a) = x2 − a2
(x – 5)(x + 5)
(x2 − 52)
= x2 − 25
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Use a suitable identity to get the following products.
(6x − 7) (6x + 7)
Simplify (m2 − n2m)2 + 2m3n2
Using identities, evaluate 992
Using identities, evaluate 1022
Using (x + a) (x + b) = x2 + (a + b) x + ab, find 103 × 98
Of which of the binomials given below is m2n2 + 14mnpq + 49p2q2 the expansion?
If a + b = 10 and ab = 18, find the value of a2 + b2
Factorise the following.
18 + 11x + x2
Factorise the following.
y2 + 7y + 12
What should be added to 4c(– a + b + c) to obtain 3a(a + b + c) – 2b(a – b + c)?
