Choose the appropriate method to solve the equation: 3x2-5x-2 = 0

Choose the appropriate method to solve the equation: 3x2-5x-2 = 0

The factorization of the equation shows that: (3x + 1) (X-2) = 0,
We can get 3x + 1 = 0 or X-2 = 0,
The solution is: X1 = - 1
3，x2=2．

Calculate (A-2) (a ^ 2 + 2A + 4) = (2x-y) (4x ^ 2 + 2XY + y ^ 2) = multiplication formula:

（a-2)(a^2+2a+4)=a(a²+2a+4)-2(a²+2a+4)=a³+2a²+4a-2a²-4a-8=a³-8(2x-y)(4x^2+2xy+y^2)=2x(4x²+2xy+y²)-y(4x²+2xy+y²)=8x³+4x²y+2xy²-4x²y...

How much is [(x + 2) (X-2)] 2 calculated by multiplication formula

[(x+2)(x-2)]²=(x²-4)²=x^4-8x²+16 [(x+2)(x-2)]²=(x+2)(x-2)(x+2)(x-2) =(x²-4)(x²-4) =x^4-8x²+16

After calculating (x + 2) (x ^ 2-2x + 4) (2x + y) (4x ^ 2-2xy + y ^ 2), find a multiplication formula

.(x+2)(x^2-2x+4) =x^3+8
(2x+y)(4x^2-2xy+y^2)=8x^3+y^3
Multiplication formula. A ^ 3 + B ^ 3 = (a + b) (a ^ 2-AB + B ^ 2)

(- 3x-2y) (- 3x-2y) is calculated by multiplication formula

（-3x-2y）（-3x-2y）
=-（3x+2y）[-（3x+2y）]
=（3x+2y）（3x+2y）
=（3x+2y）^2
=9x^2+12xy+4y^2

(3x-2y) ^ 2 - (27x ^ 3-8y ^ 3) / (3x-2y) what formula should be used to calculate the multiplication formula No plagiarism

The original formula = 9x? - 12xy + 4Y? - (3x-2y) (9x? + 6xy + 4Y?) / (3x-2y) = 9x? - 12xy + 4Y? - (9x? + 6xy + 4Y?) = 9x? - 12xy + 4Y? - 9x? - 6xy-4y? = - 18xy

Multiplication formula calculation (2x-y-3) 2

(2x-y-3)²
=(2x-y-3)(2x-y-3)
=2x*(2x-y-3)-y*(2x-y-3)-3*(2x-y-3)
=4x²-2xy-6x-2xy+y²+3y-6x+3y+9
=4x²+y²-4xy-12x+6y+9

Multiplication formula operation: (2x - Y - 3) 2

（2x - y - 3）²
=4x²+y²+9-4xy-12x+6y

[(x + 2) (X-2)] 2 is calculated by multiplication formula,

[(x + 2) (X-2)] 2
=（x²-4）²
=X quartic + 16-8x

1. Use multiplication formula to calculate 98 × 10-99 ^ 2. (2x-1) (3x + 2)= 3. If n is the middle of three continuous even numbers, then their product is

1.98*100-99*99=98*(99+1)-99*99=98*99-99*99+98=-99+98=-1
2.（2x-1）（3x+2）=2x(3x+2)-1*(3x+2)=6x^2+4x-3x-2=6x^2+x-2
3.(n-2)n(n+2)=(n-2)(n+2)*n=(n^2-4)n=n^3-4n
Welcome to ask math questions for a long time. Math enthusiasts hope to help you