Question

Please solve this problems
i) (5 + 3x^2 y)(5 - 3x^2 y)
ii) (0.2a + 0.3b)(0.2a - 0.3b)​

Answer 1

Answer:

1)(5)^-(3x^2y)^

2)(0.2a)^-(0.3b)^

Answer 2

Step-by-step explanation:

i) (5+3x^2y)(5-3x^2y)

=(5)^2-[3x^2y]^2

=25-[(3)^2×(x)^2+2]

=25-[9x^4]

=25-9x^4

[Solved using:(a+b)(a-b) =a^2-b^2]

ii) (0.2a + 0.3b)(0.2a -0.3b)

= (0.2a)^2 - (0.3b)^2

= 0.4a^2 - 0.9b^2

[ Solved using:(a+b)(a-b) =a^2-b^2]