your 2nd option is correct
Positive, because the products (−5)(−2) and (−7)(−6) are positive and the product of two positive numbers is positive
Explanation:
(−5)(−2)(−7)(−6)?
(-) × (-) = (+)
now the (+) multiplied by the 3rd (-) gives
(+) × (-)= (-)
so by multiplying the 4th (-) sign u get
(-) × (-) = (+)
(−5)(−2)(−7)(−6)= 5×2×7×6 =10×42=420