Question

What's 5x^2 + 2x - 7 = 0​

Answer 1

`\sf x=1, \ x = -1(2)/(5)`

Step-by-step explanation:

`\hookrightarrow \sf 5x^2 + 2x - 7=0`

the common multiple of 5 and 7 is 35: 7 * 5

`\hookrightarrow \sf 5x^2 + 7x-5x - 7=0`

breakdown

`\hookrightarrow \sf x(5x + 7)-1(5x + 7 )=0`

group the integers

`\hookrightarrow \sf (x-1)(5x+7)=0`

separate the parenthesis

`\hookrightarrow \sf x-1=0, \ 5x +7 = 0`

change sides

`\hookrightarrow \sf x=1, \ 5x = -7`

in improper faction

`\hookrightarrow \sf x=1, \ x = (-7)/(5)`

Final answer in mixed fraction

`\hookrightarrow \sf x=1, \ x = -1(2)/(5)`

Answer 2

21 jk

Step-by-step explanation:

Move all terms to the left side and set equal to zero. Then set each factor equal to zero. Exact Form: x = 1 , − 7 5 Decimal Form: x = 1 , − 1.4 Mixed Number Form: x = 1 , − 1 2 5