find the product of each sum and difference. (2l + 9)(2l – 9)

(a) 4l2 + 18l – 81

(b) 4l2 – 81

(c) 4l2 + 81

(d) 4l

Option c

Explanation:

As we have given in the question  

So by using the formula

So the equation will become

So according to question,  we have ,

a = 2l and b = 9

So,

And required Sum=

So the final answer of the question which is required is  Sum=

4th option is correct xy=-10

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x is greater than 5

step-by-step explanation:

2x+7 is greater than 17

    -7                           -7

2x is greater than 10

divide by 2 each side

x is greater than 5