Question

expand the following (-2a-5b)^2​

Answer 1

$((2a)^{2} - 2 \times 2a \times 5b(5b) ^{2} )$

$- (2 ^{2} a ^{2} - 2 \times 2a \times 5b + (5b )^{2} )$

$- (4a ^{2} - 2 \times 2a \times 5b + (5b) ^{2} )$

$- (4a ^{2} - 2 \times 2a \times 5b + 256b ^{2} )$

$- (4a ^{2} - 20ab + 25b^{2} )$

$- 4a ^{2} + 20ab - 25b ^{2}$

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Answer 2

Step-by-step explanation:

(−2−5)2

(−2−5) (−2−5)

−2(−2−5) −5(−2−5)

42+10 −5(−2−5)

42+10+ 10+252

42+20+252

hope it helps you ❤️