Advertisements
Advertisements
प्रश्न
Evaluate: (1.6x + 0.7y) (1.6x − 0.7y)
बेरीज
Advertisements
उत्तर
(1.6x + 0.7y) (1.6x − 0.7y)
= (1.6x)2 − (0.7y)2 ......[ ∵ (a − b) (a +b) = a2 − b2]
= 2.56x2 − 0.49y2
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Expand the following, using suitable identity:
`[1/4a-1/2b+1]^2`
Simplify the following: 175 x 175 x 2 x 175 x 25 x 25 x 25
Write in the expanded form: `(x + 2y + 4z)^2`
If x = 3 and y = − 1, find the values of the following using in identify:
\[\left( \frac{3}{x} - \frac{x}{3} \right) \left( \frac{x^2}{9} + \frac{9}{x^2} + 1 \right)\]
Use the direct method to evaluate :
(x+1) (x−1)
Expand the following:
(3x + 4) (2x - 1)
If `"a" - 1/"a" = 10;` find `"a" + 1/"a"`
If `x + (1)/x = 3`; find `x^2 + (1)/x^2`
If a2 - 3a - 1 = 0 and a ≠ 0, find : `"a" + (1)/"a"`
Expand the following:
(–x + 2y – 3z)2
