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Q: How do you find the value of the discriminant -16x2 plus 10x-20 equals 0?

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16x2 - 49 = 42x2 - 72 = (4x)2 - 72 = (4x - 7)(4x + 7)

4x times 4x equals 16x2.

Equals means=ok

You double the product of 2x8.2x8 equals 16. 16 doubled which equal 16x2 equals 32.4x8 equals 32.

sqrt(10x)*sqrt(8x) = sqrt(80x2) = sqrt(16x2*5) = sqrt(16x2)*sqrt(5) = 4x*sqrt(5)

y = -16x2 + 342At the x-intercepts, y=0-16x2 + 342 = 016x2 = 342x2 = 342/16 = 21.375x = plus and minus sqrt(21.375) = approx. plus and minus 4.6233 (rounded)

If you can't factor it easily, use the quadratic formula.

16x2 is equal to 32.

16x2 + 8x + 1 = 0 : This factorises to (4x + 1)(4x + 1) = 0 When 4x + 1 = 0 then 4x = -1 : x = -1/4.

The derivative of y=arcsin(4x) is dy/dx = 4/sqrt(1-16x2).

Add 1 to both sides. The answer is (4x + 1)(4x + 1) or (4x + 1)2

It is: 4-16x2 = (2-4x)(2+4x) when factored

4X = 16X2 4X - 16X2 = 0 (1 - 4X)4X = 0 ------------------ as you see X = 0 -------- 1 - 4X = 0 - 4X = - 1 X = 1/4 ----------- So, X = 0 and X = 1/4. You check.

The value of 64x3 + 27 depends on the value of x. If the question required factorisation, but did not ask for it, the answer is: (4x + 3)(16x2 - 12x + 9)

16x2 - 56x + 49 = (4x - 7)2

10x2 - 56 = 88 - 6x2 : 10x2 + 6x2 = 88 + 56 : 16x2 = 144 : x2 = 9 : x = ± 3

If that's 16x2 + 72x + 81, that factors to (4x + 9)(4x + 9) or (4x + 9)2

16x2 - 25 = (4x + 5) (4x - 5)

-16x2 + x + 8 = -1/64(32x - 1 - √513)(32x - 1 + √513)

16x2 - 25 = (4x + 5) ( 4x - 5)

16x2 + 40x + 25 = 16x2 + 20x + 20x + 25 = 4x(4x + 5) + 5(4x + 5) = (4x + 5)(4x + 5) = (4x + 5)2

32

16x2 + 32x - 65 = 0 factorises (4x + 13)(4x - 5) This makes x either -13/4 or 5/4.

(4x-8)2 = (4x-8)(4x-8) = 16x2-32x-32x+64 = 16x2-64x+64

ANYTIME. a number is next to a variable it means that number has to be multiplied by the variable. Try writing it out as 30 times x in the equation. Its quite simple just refere to the Order of operations and PEMDAS search around if you are not sure on how to find the value of a variable. Its actually quite simple. Since I infer you are probably doing homework I don't want to go ahead and give you the value so this is the most i can help you.