Iwill give brainliest if two people answer my question which two equations would be most appropriately solved by using the quadratic formula? select each correct answer. 0.25x2+0.8x−8=0 −(x−3)(x+9)=0 3x² = 9 −2x2+5x=7

Option 1. and 4. would be solved by the quadratic formula.

Step-by-step explanation:

We know the quadratic formula is used to find the roots of the equation, .

Now, according to the options, we see that all four options are quadratic equations.

But, we will not use the quadratic formula for all.

Because,

can be easily solved by substituting each individual factor to 0.

also can be easily solve by dividing both sides by 3 and taking square root.

Thus, the only options which will require to the quadratic formula are,

Hence, option 1 and 4 would be solved by the quadratic formula.