Question

Square of 3x – 4y is (a) 9x2 – 16y2
(b) 6x2 – 8y2
(c) 9x2 + 16y2 + 24xy (d) 9x2 + 16y2 – 24xy

Answer 1

Answer:

• Option D
• $(a - b)^{2} = {a}^{2} + {b}^{2} - 2 \times ab$
• using above formula, we get
• ${(3x)}^{2} + {(4y)}^{2} - 2 \times 3x \times 4y$
• =
• ${9x }^{2} + {16y}^{2} - 24xy$
• Option D is correct