Question

Solve 2x2 - 7x - 15 = 0.​

Answer 1

-18

Explanation:

Follow PEMDAS. So first you do 2x2=4 then 4-7x= -3-15= -18

Answer 2

Good evening ,

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Answer:

x’=5

x’’=(-3)/2

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Explanation:

Δ=(-7)²-4×(2)×(-15)=49+120=169

√Δ=√169=13

then

x’=(7+13)/4=20/4=5

x’’=(7-13)/4=(-6)/4=(-3)/2.

:)