Advertisements
Advertisements
प्रश्न
Show that: (3x + 7)2 − 84x = (3x − 7)2
Advertisements
उत्तर
\[ \text { LHS } = \left( 3x + 7 \right)^2 - 84x\]
\[ = \left( 3x + 7 \right)^2 - 4 \times 3x \times 7\]
\[ = \left( 3x - 7 \right)^2 \left[ \because \left( a + b \right)^2 - 4ab = \left( a - b \right)^2 \right]\]
= RHS
Because LHS is equal to RHS, the given equation is verified.
संबंधित प्रश्न
Express each of the following product as a monomials and verify the result in each case for x = 1:
(x2)3 × (2x) × (−4x) × (5)
Find the following product: \[\frac{7}{5} x^2 y\left( \frac{3}{5}x y^2 + \frac{2}{5}x \right)\]
Multiply:
(a − 1) by (0.1a2 + 3)
Multiply:
(3x2 + y2) by (2x2 + 3y2)
Multiply:
[−3d + (−7f)] by (5d + f)
Simplify:
(5x + 3)(x − 1)(3x − 2)
Simplify:
(3x − 2)(2x − 3) + (5x − 3)(x + 1)
Simplify:
(x2 − 3x + 2)(5x − 2) − (3x2 + 4x − 5)(2x − 1)
Multiply:
16xy × 18xy
What is (−4ab) × (2a²b³)?
