Advertisements
Advertisements
प्रश्न
Using (x + a) (x + b) = x2 + (a + b) x + ab, find 9.7 × 9.8
Advertisements
उत्तर
9.7 × 9.8 = (10 − 0.3) (10 − 0.2)
= (10)2 + [(− 0.3) + (− 0.2)] (10) + (− 0.3) (− 0.2)
= 100 + (− 0.5)10 + 0.06 = 100.06 − 5 = 95.06
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
संबंधित प्रश्न
Use a suitable identity to get the following products
(2a − 7) (2a − 7)
Simplify (2x +5)2 − (2x − 5)2
Using identities, evaluate 9982
Using (x + a) (x + b) = x2 + (a + b) x + ab, find 103 × 104
Expand `("a"/2+"b"/3)^2`
Which of the options given below is the square of the binomial `(8-1/"x")`?
Use the formula to multiply the following.
(a + 6) (a − 6)
Expand: (2x + 3y)2
Evaluate the following, using suitable identity
512
If a2 + b2 = 74 and ab = 35, then find a + b.
