Advertisements
Advertisements
Question
Using identities, evaluate 712
Advertisements
Solution
712 = (70 + 1)2
= (70)2 + 2(70) (1) + (1)2 [(a + b)2 = a2 + 2ab + b2 ]
= 4900 + 140 + 1 = 5041
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Find the following squares by suing the identities.
(6x2 − 5y)2
Simplify (4m + 5n)2 + (5m + 4n)2
Simplify (ab + bc)2 − 2ab2c
Using identities, evaluate 9982
Use an expansion formula to find the value.
(997)2
Factors of 9x2 + 6xy are
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
x2 + 14x + 49
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.
a2x2 + 2abxy + b2y2
The area of a circle is given by the expression πx2 + 6πx + 9π. Find the radius of the circle.
