Question

simplify (4a+5b )^2-(4a-5b)^2​

Answer 1

Answer:

80ab

Step-by-step explanation:

(4a+5b )^2-(4a-5b)^2

{IDENTITIES - (a+b)^2=a^2 + 2ab + b^2

(a-b)^2=a^2 - 2ab + b^2}

(4a+5b )^2-(4a-5b)^2

{16a^2+2(4a)(5b)+25b^2}-{16a^2-2(4a)(5b)+25b^2}

16a^2+40ab+25b^2-16a^2+40ab-25b^2

80ab

plz like and follow if this answer helped you

Answer 2

Answer:

80ab

Step-by-step explanation:

(4a+5b)^2 -(4a-5b)^2

{16a√2+2(4a)(5b) +25b√2}-{16a√2-2(4a)(5b)+25b√2 }

it's very hard for me plz follow me