Advertisements
Advertisements
प्रश्न
(5 + 20)(–20 – 5) = ?
पर्याय
− 425
375
− 625
0
Advertisements
उत्तर
– 625
Explanation;
Hint: (50 + 20)(–20 – 5) = – (5 + 20)2
= – (25)2
= – 625
APPEARS IN
संबंधित प्रश्न
Choose the right answers from the option:
The difference of the squares, (612 – 512 ) is equal to ______.
Factorise the following algebraic expression by using the identity a2 – b2 = (a + b)(a – b)
x4 – y4
Using identity, find the value of (1.9) × (2.1)
Multiply the following:
(a2 – b2), (a2 + b2)
Using suitable identities, evaluate the following.
(35.4)2 – (14.6)2
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
28ay2 – 175ax2
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
p5 – 16p
Factorise the expression and divide them as directed:
(x4 – 16) ÷ x3 + 2x2 + 4x + 8
Verify the following:
(a + b + c)(a2 + b2 + c2 – ab – bc – ca) = a3 + b3 + c3 – 3abc
Verify the following:
(a2 – b2)(a2 + b2) + (b2 – c2)(b2 + c2) + (c2 – a2) + (c2 + a2) = 0
