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4x2 - 9 = (2x + 3)(2x - 3)

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13y ago

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What is 81 minus 16 and a number squared?

There is a formula for factoring the "difference of squares." In this case, the answer is (9 - 4x)(9 + 4x)


How do you solve for y squared minus nine?

y squared minus 9 (y*y)- 9 cannot be solved because there is no given value for 9.


How do you solve 16t squared minus 9 equals 0?

Solve this problem -x squared -40x- 80 =0


How do you factor 4x squared minus 36x plus 81?

(2x - 9)(2x - 9) or (2x - 9)2


How do you factor 8x squared plus 6x minus 9?

(4x - 3)(2x + 3)


What is the solution for x if sqrt parentheses 4x plus 7 endparentheses minus 4 equals sqrt parentheses 4x minus 1 endparentheses?

sqrt(4x+7) -4 = sqrt(4x-1) squared : (sqrt(4x+7) -4)2 = 4x-1 (4x+7) - 2x4xsqrt(4x+7) +16 = 4x-1 -8xsqrt(4x+7) = -24 sqrt(4x+7) = -24/-8 = 3 squared : 4x+7 = 32 = 9 4x = 9-7 = 2 then x=1/2


What are the factors of 8x squared plus 6x minus 9?

8x2 + 6x - 9 = 8x2 + 12x - 6x - 9 = 4x(2x + 3) - 3(2x + 3) = (2x + 3)(4x - 3)


What is 6x minus 2x minus 9?

Let 6x - 2x - 9 = a, where a is an arbitrary constant. Then 4x - 9 = a 4x = a+9 x = (a+9)/4


How do you solve 4x - 9 equals 35?

4x - 9 = 35 4x = 35 + 9 4x = 44 4x/4 = 44/4 x=11


How do you solve x plus 9 squared?

x=9 squared


What is the inverse function of the equation y equals 4x plus 9 Divided by 2x minus 3?

y = (4x+9)/(2x+3)2xy+3y = 4x+93y-9 = 4x-2xy3y-9 = x(2-2y)x = (3y-9)/(2-2y)So, inverse function is 3x minus 9 divided by 2 minus 27.


How do you factor 4x squared minus 81?

4x^(2) - 81 First remember the two numbers are both squared numbers. 4 = 2^(2) & 81 = 9^(2) Hence (2x)^(2) - 9^(2) Next remember two squared terms with a negative(-) between them , will factor. Hence (2x - 9)(2x + 9) Note the two different signs. NB Two squared terms with a positive (+) between them does NOT factor. .